| 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!
A few focal lengths have sold out,but the OR4 / 5 / 12.5 and 18mm eyepieces remain available in 0.965" barrel sizes. 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" (4mm / 5mm / 6mm / 7mm / 9mm / 12.5mm /18mm /25mm) or 0.965" (4mm / 5mm / 12.5mm /18mm ) barrel size. Please specify FL and barrel size upon your order. Every OR eyepiece includes plastic caps on both ends.
Please see below for eyepiece specs. The 1.25" barrel size ORs are usually in stock for immediate delivery. The 0.965" barrel size ORs and Japanese made Kelner and Erfle eyepieces are available on a special order basis, with delivery about 2~4 weeks from your order.
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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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SOLD OUT
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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" |
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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The above "SOLD OUT" 0.965" size OR eyepieces are out of stock and commencing a new production run requires a minuimum 500 pc order per size. Hence the SOLD OUT designation.....The good news is that we anticipate being able to deliver the remaining .965" size ORs, and all the .965" size Kelners, for the time being, with about a 2 ~ 4 week delivery time from order. The 1.25" ORs will continue to around for a while :- ) BG
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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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32,800 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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29,800 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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29,800 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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29,800 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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29,800 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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29,800 Yen
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XW30mm
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70 degree
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20mm
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6 group / 7 lens
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36.2
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76 x 123
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740
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43,800 Yen
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XW40mm
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70 degree
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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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45,800 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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NEARLY GONE *
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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SOLD OUT
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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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NEARLY GONE *
23,200 Yen
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*pls check availability at time of your order (as available quantities are so small right now. that they might actually already be sold out)
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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 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 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
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20mm
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5 group / 8 lens
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500
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20,100 Yen
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LVW8mm
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65 degree
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20mm
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6 group / 8 lens
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495
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17,600 Yen
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LVW13mm
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65 degree
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20mm
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6 group / 7 lens
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460
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18,400 Yen
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LVW17mm
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65 degree
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20mm
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6 group / 7 lens
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440
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19,300 Yen
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LVW22mm
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65 degree
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20mm
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4 group / 6 lens
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430
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21,100 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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20,100 Yen
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LVW42mm
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65 degree
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20mm
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6 group / 7 lens
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545
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31,900 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
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3 group / 6 lens
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215
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15,750 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
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Please add 2,500 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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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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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)
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