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. Each eyepiec includes plastic caps on both ends.

Made in Japan Pentax Eyepieces

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.

Pentax XW Series (visual) Eyepiece Specs
Focal Length	Field of View	Eye relief	Lens Design	Size (mm)	Weight (gram)	Price (Japan Yen)
XW3.5mm	70 degree	20mm	5 group / 8 lens	61 x 137	405	34,400 Yen
XW5mm	70 degree	20mm	5 group / 8 lens	61 x 127	395	31,200 Yen
XW7mm	70 degree	20mm	6 group / 8 lens	61 x 120	390	31,200 Yen
XW10mm	70 degree	20mm	6 group / 7 lens	61 x 110	390	31,200 Yen
XW14mm	70 degree	20mm	6 group / 7 lens	61 x 97	365	31,200 Yen
XW20mm	70 degree	20mm	4 group / 6 lens	61 x 86	355	31,200 Yen
XW30mm	70 degree	20mm	6 group / 7 lens	76 x 123	740	55,400 Yen
XW40mm	70 degree	20mm	5 group / 6 lens	76 x 117	700	57,500 Yen
Pentax X0 Series (high magnification visual and eyepiece projection) Eyepiece Specs
XO 2.5mm	44 degree	3.9mm	3 group / 6 lens	37 x 56	105	28,300 Yen
XO 5mm	44 degree	3.6mm	3 group / 5 lens	37 x 45	90	28,300 Yen
Pentax XP Series (eyepiece projection) Eyepiece Specs
XP 3.8mm	N / A	N / A	3 group / 5 lens	30 x 33	40	16,000 Yen
XP 8mm	N / A	N / A	5 group / 6 lens	30 x 42	50	19,600 Yen
XP 24mm	N / A	N / A	5 group / 6 lens	30 x 69	70	23,200 Yen
Pentax XF Series (for field scope and binoviewers) Eyepiece Specs
XF 8.5mm	60 degree	18mm	4 group / 6 lens	43 x 83	150	15,750 Yen
XF 12mm	60 degree	18mm	4 group / 6 lens	43 x 78	150	15,750 Yen

XP Series Eyepiece	XP 3.8mm	XP 8mm	XP 24mm

We ship via fast EMS Airmail to anywhere in the world!
to ship one XW eyepiece	Please add 3,000 Yen to your order
for additional eyepiece	Will provide a quote
to ship XO or XP eyepiece	please use OR eyepiece EMS airmail pricing
Payment via PayPal welcome! Our Paypal account is linked to my email address: magellan@kkohki.com

Questions, comments, concerns? Please email me (Barry Gooley)

Highest quality Japanese design and finish, at a very reasonable price

Due to so many requests, Kokusai Kohki now 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 also 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

* All LVWs are 1.25" barrel size and offer a nearly unvignetted full 65 degree field of view

* All LVW eyepieces are threaded for standard 1.25" size filters.

Combining highest contrast with razor sharpness, the TMB is perhaps the ultimate planetary eyepiece.

Though not made in Japan, as the local rep for TMB products in Japan, we have recieved a surprising number of orders for the venerable German made TMB eyepiece lineup, from all over the world. At the request of a number of our foreign customers, I will take the liberty to place these here on our Japanese products pages, as "honorary" Japanese products.

TMB eyepieces are designed by Thomas Back of the USA and made in Germany to extremely high standards in Germany under the direction of APM. TMBs utilize extremely high refractive index glass polished with excrutiating slowness to a nearly unprecendented level of surface perfection, providing the most discriminating planetary observer with a no-compromise, ultimate of high contrast and image clarity. A trade off for this single minded design is a narrow 30 degree FOV that relegates TMB eyepieces mainly to planetary observations but we have also heard many nice things about the TMBs from local double star and globular cluster observers. The near 99% light throughput, image contrast and sharpness, on top of an amzing level of background "noise" suppression lets me confidently say that you will find the narrow FOV a non-factor in your viewing pleasure.

For maximum light throughput and bright images, all TMB lens surfaces are fully multi-coated. In keeping with the no-compromise design goals of highest contrast and image sharpness, TMB eyepieces have short eye relief that may not accomodate eye glass wearers. Also, the amazing efficacy of this eyepiece is best realized with a high quality apochromat lens sytem. All TMB eyepieces are threaded for standard 1.25" size filters.

The TMB 1.8X ED barlow gives added magnification that efectively doubles the number of focal lengths available with the TMB eyepiece series. Designed specifically for the TMB eyepiece, the 1.8X barlow`s ED lens adds no color whle maintainin the high level of sharpness and high contrast that thie TMBs are famouns for. Only a few left and when they are gone, they are gone!

TMBs are quickly being phased out, due (we think) partially to their difficult and high cost manufacturing method, so when our final inventory sells out, we do not expect to be resupplied. Our present inventory, along with product specs is as follows. First come first served!

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.

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.