| User comment: |
| Your OR25 could have the highest sharpness, throughput, contrast and resolution theoretically possible. I`d say your OR 18s and especially the OR25 are in a class all their own regardless of maker and price. |
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M Zander (Nishinomiya City, Japan
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Top Notch workmanship, design and optical performance
Maximum sharpness, resolution, throughput and contrast
--- At a very low price---
Japanese Orthoscopic Eyepieces
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Get Real Japanese Orthoscope Eyepieces!
ORs are also available in 965" barrel sizes, in all 8 focal lengths. Compare size against the 1.25" size OR25 at upper left corner. |
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Our world famous lineup of orthoscopic eyepieces sport the highest quality Japanese workmanship, sharp "eagle-eye" views and excellent color correction. Our OR eyepieces will satisfy even the most demanding planetary observer, including those used to much more expensive and "flashy" name brand eyepieces, but at 1/4 ~1/10 the cost! OR YOUR MONEY BACK!
Our OR eyepieces are lovingly handmade, one at a time by craftsmen at the Tokyo factory. Producing them now for over 40 years, you can be sure of optical, mechanical and design quality you can be proud of for years to come. High magnification inclined apo-refractor, Maksutov, SCT and Mewlon users will be especially pleased with their planetary and double star viewing performance. The gorgeous barrel design includes snug filter threads and a tight, sharp field stop that precisely defines the field of view. All OR eyepiece also include caps on both ends.
For maximum image definition, contrast and light transmission, the eye lens of each eyepiece is multicoated, all other surfaces are magnesium flouride coated. Eye relief is plentiful and images merge well when used in a binocular viewer. Apparent field of view of all focal lengths hovers in the 45< degree range.
This level of quality comes at the very low price of 4,800 yen each, meaning that getting even an entire set, or doubling up for binoviewing, is a more than reasonable proposition. Eyepieces weigh in at 65~95 grams for 1.25" and from 40 to 65 grams in the .965" size. Eye lens diameters for the shortest three focal lengths range from 3mm for the OR4, 4mm for OR 5 and 5mm for OR6.
Our OR eyepieces are available in either 1.25" or .965" barrel sizes, in the following focal lengths: 4mm / 5mm / 6mm / 7mm / 9mm / 12.5mm /18mm /25mm. Please specify FL and barrel size upon your order. Every OR eyepiece includes plastic caps on both ends.
(Please see below OR eyepiece specs We also offer Kelner and Erfle eyepieces on a made to order basis)
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My promise to you: You will either love your OR eyepiece or you get your money back!
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Made in Japan highest quality ERFLE eyepieces available in 16mm, 20mm and 25mm focal lengths (1.25" barrel only).
Kelner 6 / 9 / 12 / 18 / 20 and 25mm also available on a Made to Order basis (2~4 week delivery, please specify .965" or 1.25" barrel sizes)
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Kokusai Kohki ORTHOSCOPIC (Or), KELNER (K) and ERFLE (ER) Eyepiece Specifications
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Eyepiece
Type
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AVAILABLE
Barrel Sizes
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Eye Lens OD
(mm)
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F.O.V (degrees)
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Eye Relief (mm)
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Weight (gr)
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Item No
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Item No
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Price (Yen)
For a currency conversion site
click here
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.965"
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1.25"
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.965"
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1.25"
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.965"
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1.25"
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OR 4mm
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.965" or 1.25"
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4
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41
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41
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3.5
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40
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80
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1012
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1004
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4,800 Yen
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OR 5mm
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.965" or 1.25"
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4.5
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43
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43
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4.0
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40
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85
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1013
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1005
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4,800 Yen
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OR 6mm
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.965" or 1.25"
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5.8
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43
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43
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4.8
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42
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90
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SOLD OUT
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1006
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4,800 Yen
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OR 7mm
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.965" or 1.25"
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6.5
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42
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42
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5.6
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45
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90
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SOLD OUT
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1007
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4,800 Yen
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OR 9mm
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.965" or 1.25"
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8.3
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42
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42
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7.2
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47
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92
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SOLD OUT
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1008
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4,800 Yen
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OR 12.5mm
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.965" or 1.25"
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11
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44
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44
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10
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50
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96
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1017
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1009
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4,800 Yen
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OR 18mm
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.965" or 1.25"
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17
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44
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46
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14.4
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65
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97
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1018
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1010
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4,800 Yen
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OR 25mm
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.965" or 1.25"
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21
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45
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47
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20
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76
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100
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1019
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1011
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4,800 Yen
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Kelner 6mm
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.965" or 1.25"
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5.8
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42
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42
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4.8
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55
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85
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1028
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1020
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3,300 Yen
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Kelner 9mm
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.965" or 1.25"
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10
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44
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44
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7.2
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60
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105
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1029
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1021
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3,300 Yen
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Kelner 12mm
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.965" or 1.25"
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8.5
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40
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40
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4.0
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62
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120
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1030
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1022
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3,300 Yen
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Kelner 18mm
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.965" or 1.25"
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16.8
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45
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47
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9.6
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65
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100
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1031
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1023
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3,300 Yen
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Kelner 20mm
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.965" or 1.25"
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16.8
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45
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47
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15
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65
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100
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1032
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1024
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3,300 Yen
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Kelner 25mm
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.965" or 1.25"
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16.8
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42
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45
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16
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75
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105
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1033
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1025
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3,300 Yen
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Erfle 16mm
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1.25"
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15.5
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N/A
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60
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9.6
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NA
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175
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N/A
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1001
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8,190 Yen
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Erfle 20mm
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1.25"
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21
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N/A
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62
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11
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NA
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175
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N/A
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1002
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8,190 Yen
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Erfle 25mm
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1.25"
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22
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N/A
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62
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21
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NA
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175
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N/A
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1003
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8,190 Yen
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We ship via fast EMS Airmail to anywhere in the world!
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to ship you 1 ~ 3 OR eyepieces
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Please add 2,000 Yen to your order
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to ship you 4 ~ 6 OR eyepieces
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Please add 2,500 Yen to your order
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to ship you 7~10 OR eyepieces
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Please add 3,500 Yen to your order
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to ship you 11+ OR eyepieces
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Fee varies according to destination. Please request a quote
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Payment via PayPal welcome! Our Paypal account is under my email address: magellan@kkohki.com
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Sorry, no shopping basket... For orders and inquiries Please email me (Barry Gooley)
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Pentax Eyepieces
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70 degree apparent field of view, Eye relief 20mm
Practically waterproof, to assure you of years of problem-free observing
Beautiful to look AT, as well as look through
Due to popular demand, Kokusai Kohki now offers our overseas friends the fabulous Pentax XO and XW series wide angle SMC (super multi-caoted) eyepiece lineup.Though not rock bottom low price, this premium eyepiece provides tack sharp and bright images to the edge of the very wide field. Adding in superior light throughput and plenty of eye relief, the XW series deserves a place in every serious observer`s eyepiece case. The Pentax XW series also offers the discriminating observer the following benefits:
* All focal lengths standardized with a dazzling 70 degree field of view, and generous 20mm of eye relief, for ease of viewing even when wearing glasses.
* A brand new design that incorporates high refractive index Lanthanum glass elements. This sophisticated design corrects and balances all optical abberrations for images that approach optical perfection. An added plus is the extra effort made to compensate for spherical aberations found in the human eye, virtually removing kidney bean and blackout effects. A truly easy to view through eyepiece.
* Proprietary Pentax multi-coatings on every air to glass surface, with special coatings also applied to all cemented surfaces, assuring you of superior light transmission (550nm transmits at approximately 96%, and overall transmission of all visible wavelengths measured at over 90%)
* Computer designed field stops placed at critical locations provide the highest degree of high contrast views
* Choose from 3.5mm, 5mm, 7mm, 10mm, 14mm, 20mm, 30mm and 40mm focal lengths. A full lineup of all your favorite focal lengths let you choose exactly the right eyepiece for low power viewing of Milky way star fields all the way to medium and high power planetary and lunar observing.
* The XW series conforms to a JIS 4 "daily use" waterproofing rating, assuring you that your eyepiece will give you maximum value over the years by remaining unaffected by the usual dewing and wetness that occur during your observation sessions (Note: this level does NOT assure waterproofing if the eyepiece is totally immersed in water).
* The WX series 3.5mm to 20mm eyepieces use a 1.25" size barrel and the XW30mm and XW40mm come with a 2 inch barrel.
* Height adjustable rotating eye caps let you easily place your eye at the exact location for comfortable viewing and perfect eye relief. Removing the eye cap exposes a 43mm / P0.75mm pitch male thread, for accessory attachment.
* All Pentax XW and XO eyepieces are threaded for standard 1.25" , or 2" size filters, depending on their barrel sizes.
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Pentax XW Series (visual) Eyepiece Specs
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Focal Length
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Field of View
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Eye relief
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Lens Design
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Field Stop(mm) |
Size (mm)
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Weight (gram)
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Price (Japan Yen)
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XW3.5mm
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70 degree
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20mm
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5 group / 8 lens
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4.3
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61 x 137
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405
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34,400 Yen
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XW5mm
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70 degree
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20mm
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5 group / 8 lens
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6.2
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61 x 127
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395
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31,200 Yen
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XW7mm
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70 degree
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20mm
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6 group / 8 lens
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8.8
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61 x 120
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390
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31,200 Yen
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XW10mm
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70 degree
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20mm
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6 group / 7 lens
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12.4
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61 x 110
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390
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31,200 Yen
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XW14mm
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70 degree
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20mm
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6 group / 7 lens
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17.6
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61 x 97
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365
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31,200 Yen
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XW20mm
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70 degree
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20mm
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4 group / 6 lens
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24.0
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61 x 86
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355
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31,200 Yen
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XW30mm
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70 degree
|
20mm
|
6 group / 7 lens
|
36.2
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76 x 123
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740
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55,400 Yen
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XW40mm
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70 degree
|
20mm
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5 group / 6 lens
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46.5
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76 x 117
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700
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57,500 Yen
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Pentax X0 Series (high magnification visual and eyepiece projection) Eyepiece Specs
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XO 2.5mm
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44 degree |
3.9mm
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3 group / 6 lens
|
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37 x 56
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105
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28,300 Yen
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XO 5mm
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44 degree |
3.6mm
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3 group / 5 lens
|
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37 x 45
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90
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28,300 Yen
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Pentax XP Series (eyepiece projection) Eyepiece Specs
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XP 3.8mm
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N / A
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N / A
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3 group / 5 lens
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30 x 33
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40
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16,000 Yen
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XP 8mm
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N / A
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N / A
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5 group / 6 lens
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30 x 42
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50
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19,600 Yen
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XP 24mm
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N / A
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N / A
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5 group / 6 lens
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30 x 69
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70
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23,200 Yen
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Pentax XF Series (for field scope and binoviewers) Eyepiece Specs
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XF 8.5mm
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60 degree
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18mm
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4 group / 6 lens
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43 x 83
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150
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15,750 Yen
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XF 12mm
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60 degree
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18mm
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4 group / 6 lens
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43 x 78
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150
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15,750 Yen
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XP Series Eyepiece
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XP 3.8mm
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XP 8mm
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XP 24mm
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We ship via fast EMS Airmail to anywhere in the world!
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to ship one XW eyepiece
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Please add 3,000 Yen to your order
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for additional eyepiece
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Fee varies according to destination. Please request a quote
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to ship XO or XP eyepiece (and no XWs)
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please use OR eyepiece EMS airmail pricing
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Payment via PayPal welcome! Our Paypal account is under my email address: magellan@kkohki.com
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Sorry, no shopping basket... For orders and inquiries Please email me (Barry Gooley)
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VIXEN LVW Eyepieces
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Highest quality Japanese design and finish, at a very reasonable price
Kokusai Kohki offers the Vixen wide angle LVW eyepiece lineup to our overseas friends and neighbors. The LVW lineup provides a wide 65 degree field of view, with plenty of eye relief. Special multi-coatings, a solid optical design and a Japanese standard excellent finish, are all included at a most reasonable price. For high end viewing quality without the high end price tag, we heartily recommend the Vixen LVW lineup, including the low cost and fun LV 8 ~ 24mm zoom eyepiece from the previous "LV" series of eyepieces. Benefits the Vixen LVW eyepiece series offers the discriminating observer include the following:
* For maximum light throughput and bright images, all lens surfaces are fully multi-coated.
* All LVW focal lengths provide a generous 20mm of eye relief, to allow many comfortable hours of viewing, even when wearing glasses
* LVW 3.5mm to 2mm are 1.25" barrel size, the new NLVW30 and LVW42 are 2" barrel size, and all offer a nearly unvignetted full 65 degree field of view
* All LVW eyepieces are threaded either for standard 1.25" or 48mm size filters.
* the brand new NLVW-30mmeyepiece provides a very bright, crisp 65 degree FOV with excellent color rendition. The NLVW-30`s new exterior is an interesting contrast to the rest of the LVW lineup and the eyepiece is strikingly lightweight, at only 363grams. Well priced, at only 20,160 yen, and perfect for low power wide field views through Schmidt Cassegrains, large aperture dobs and even short focal length achromat to apo refractors. Available now!
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VIXEN LVW Series Eyepiece Specs (1.25 inch sleeve)
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Focal Length
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Field of View
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Eye relief
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Lens Design
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Weight (gram)
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Price (Japan Yen)
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LVW3.5mm
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65 degree
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20mm
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5 group / 8 lens
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510
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21,000 Yen
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LVW5mm
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65 degree
|
20mm
|
5 group / 8 lens
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500
|
20,160 Yen
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LVW8mm
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65 degree
|
20mm
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6 group / 8 lens
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495
|
17,640 Yen
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LVW13mm
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65 degree
|
20mm
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6 group / 7 lens
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460
|
18,480 Yen
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LVW17mm
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65 degree
|
20mm
|
6 group / 7 lens
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440
|
19,320 Yen
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LVW22mm
|
65 degree
|
20mm
|
4 group / 6 lens
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430
|
21,160 Yen
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VIXEN LVW Series Eyepiece Specs (2 inch sleeve)
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NLVW30mm
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65 degree
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22.4mm
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3 group / 5 lens
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363
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20,160 Yen
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LVW42mm
|
65 degree
|
20mm
|
6 group / 7 lens
|
545
|
31,920 Yen
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VIXEN LV Series (visual) Zoom Eyepiece Specs
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LV8 ~ 24mm
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60 ~ 40degree
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19mm
|
3 group / 6 lens
|
215
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16,800 Yen
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We ship via fast EMS Airmail to anywhere in the world!
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to ship one LV Zoom or LVW eyepiece
|
Please add 2,500 Yen to your order
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for additional eyepiece
|
Fee varies according to destination. Please request a quote
|
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Payment via PayPal welcome! Our Paypal account is under my email address: magellan@kkohki.com
|
Sorry, no shopping basket... For orders and inquiries Please email me (Barry Gooley)
To Page Top
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KOKUSAI KOHKI EF-508 8x50 Correct View Finder
Attractive as well as functional, the EF-508 correct view finder "Complete Set",
includes the EF-508 finder OTA, finder bracket, foot, and LED illuminator (price 18, 690 yen)
EF-508 OTA, only, includesa brightness adjustable LED illuminator (price 16,590 yen)
One of the world`s few "correct-view" finders, The EF-508 is an 8x50 that shows you the night sky exactly as the unaided eye sees it, that is, right side up! This makes object acquisition, aligning the sky with your star map or DSC, or just looking around, so much more natural and easier than through the typical inverted image finder.Your EF-508 comes with a robust and easily detachable finder bracket, including a foot that stays mounted to your scope`s tube. This foot attaches to Meade and Celestron SCT tube assemblies as is, with no modifications.
The EF-508 uses a superior quality pechan prism that gives bright, clear, distortion free images, far superior to the dark, lusterless images of some correct-view finders in the past. The EF-508 recticle`s center circle surrounds your object so that you know when you`ve found it, not covering it up as standard X style crosshairs tend to do. The surrounding scale is divided into 1 degree increments. A red LED recticle adjusts for brightness with a quick turn of the knob. The illuminator uses three included, and commonly available LR41 batteries.
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| Everything about the EF-508 could be considered "robust", including the attractive removeable finder bracket. The bracket comes free of the mounting foot that attaches to your telescope with the turn of two finger screws. Anodized aluminum rings allow for a wide range of collimation adjustment, and then hold your finder OTA tightly in place, with no loss of collimation even with multiple removals and attachments. |
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| An updside down Japanese neighborhood is perhaps not be what you see thru a standard finderscope ;- ) but a left to right inverted upside down image like this is what a typical finderscope shows. Though one can get used to this, and we do, upside down (and left / right inverted) is, well, upside down and left / right inverted.... Compare this view with the same scene thru the correct view EF-508 at right. |
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This is more like it! The EF-508 shows us the same scene in "normal" correct view, with an easy to understand direction orientation. Object acquisition, or just making sense of what you are seeing in the night sky thru your finder also becomes correspondingly so much easier with the correct view EF-508 finder. This photo also shows the EF-508`s recticle pattern, with it`s center circle that does not cover up the object you have found. 1 degree increments are engraved on the "vertical" axis. |
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Brightness adjustable red LED included.
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ER-508 Correct View Finder Specs
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| Objective Lens |
Multi-coated 50mm achromat lens (actual aperture 48mm) |
| Eyepiece |
Multi-coated 8X Kelner, eye relief 18mm, with rubber eyeguard |
| Field of View |
7 degrees (AFOV 56 degrees) |
| Image Erecting Prism |
Pechan Prism |
| Overall length of OTA |
approx 235mm |
| OTA OD / Color |
approx 55mm / WHITE (White tube color and black anodized aluminum bracket matches most telescope main OTA colors) |
| Total weight |
approx 920 grams (OTA 520 grams, bracket 400 grams) |
| Reticle |
Simple crosshair, with center circle, marked in 1 degree increments |
| Red LED illuminator |
Included, with variable brightness control / uses three LR41 batteries(included) |
| Focus |
Lens and eyepiece focus positions independently (helicoidly) adjustable |
| Finder Bracket |
Robust construction easily detaches from "foot" (which attaches to SCTs without modification) by loosening two lock screws, black anodized aluminun, 6 oversized OTA alignment bolts, overall dimensions approximately 135m x 72mm x 80mm |
| EF-508 Complete Set |
18,690 yen includes EF-508 OTA, finder bracket with foot, and brightness adjustable LED illuminator and batteries |
| EF-508 OTA only |
16,590 yen EF-508 OTA, and brightness adjustable LED illuminator and batteries only, but no finder bracket or foot |
| EF-508 bracket only |
6,090 yen finder bracket and foot only, no finder OTA |
| VIXEN 50mm finder bracket "L" |
4,200 yen 2008 model Vixen 50mm finder backet "L" (long)) allows attachment of EF-508 to GSO and LightBridge etc dovetail mount (dovetail mount not included) |
| VIXEN 50mm finder bracket "S" |
4,200 yen 2008 model Vixen 50mm finder backet "S" (short) allows attachment of EF-508 to GSO and LightBridge etc dovetail mount (dovetail mount not included) |
Dovetail bracket for VIXEN
50mm finder bracket "L" or "S" |
750 yen optional dovetail bracket for VIXEN "L" or "S" type 50mm finder bracket, to mount to EF-508 to many other OTAs |
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to EF-508 Japanese page
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We ship via fast EMS Airmail to anywhere in the world!
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to ship 1 complete EF-508 w/ std or Vixen finder bracket
|
Please add 3,500 Yen to your order
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to ship 1 EF-508 OTA only
|
Please add 3,000 Yen to your order
|
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Payment via PayPal welcome! Our Paypal account is under my email address: magellan@kkohki.com
|
Sorry, no shopping basket... For orders and inquiries Please email me (Barry Gooley)
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Eyepiece Bolt Cases
Tough screw-on plastic bolt covers protect eyepieces from dust, grime, wetness and abrasion. Choose from 3 sizes that will fit all but the latest super sized eyepieces. Low cost, light weight and with tight threads that do not come undone unless you want them to. Cheap insurance that will keep you eyepieces individually protected, and will probably do so forever, with no maintenance. Will also accept labeling with an oil based felt pen. (Water resistant but not waterproof- not to be immersed in water with your preciosu eyepiece inside!). These bolt cases probably have a thousand other uses as well. How about nuts and bolts, coins, trail mix or even coffee grounds.... ; - )
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Part #
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Part Name
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Inside dimensions
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Price
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NEC1
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Screw on Bolt Case "Large"
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64mm x 115mm
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580 yen
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NEC2
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Screw on Bolt Case "Medium"
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48mm x 102mm
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380 yen
|
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NEC0
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Screw on Bolt Case "Small"
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40mm x 80mm
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280 yen
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Sorry, no shopping basket... For orders and inquiries Please email me (Barry Gooley)
To Page Top
|
