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Kokusai Kohki 1.25" Fujiyama HD-OR Orthoscopic Eyepiece (Japan) - 18mm
| Brand | Kokusai Kohki |
| Part Number | HD-OR 18mm |
| Availability | available |
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Product Info
Manufacturer Description
Kokusai Kohki continues the tradition of offering the highest quality Japanese made Orthoscopic eyepieces with the introduction of their brand new FUJIYAMA HD-OR eyepiece lineup. Fujiyama HD-ORs are hand crafted at their Tokyo factory and individually inspected before shipping.
Named after the Japanese name for that sky reaching symbol of Japan - Mt. Fuji - the FUJIYAMA HD-ORs come standard with multicoatings on all air to glass surfaces (cemented lens surfaces are uncoated), giving them extended light throughput, and brighter images overall, as compared to Kokusai Kohki's previous volcano-top OR eyepiece lineup. And all lenses are edge blackened to reduce internal light scatter and reflections to an absolute minimum.
The entire Fujiyama lineup is parfocal, accepts standard 1.25" astronomy filters, and comes with plastic eyepiece caps. The chrome barrels of the Fujiyama HD-ORs are smooth-sided, and they have removed the helpful, but also often annoying, safety groove.
Solid construction, bright, clean and sharp views throughout a fully corrected 42 degree AFOV with sharp field stops makes the Fujiyamas perfect for every type of viewing. They are also an exellent match with high end apochromats for hard core planetary, lunar, solar and double star viewing.
Each eyepiece carries a one year Kokusai Kohki parts and labor warranty.
Reviews
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Dec 25, 2018
Excellent product for the money.
Pros: Cons: Comments:Excellent product for the money. They work well in everything from my 80mm f/11.6 to my 10" f/5. Sharp to the edges with excellent color and contrast. From deep sky to lunar and planetary, this and my other KK's are my most used lenses.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Oct 5, 2018No complaints
Pros: Cons: Comments:Nope, no complaints at all! Best eyepiece I've ever bought. Just recently purchased the 12.5; so hoping the 25mm comes back into stock....
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Feb 4, 2017the Fujiyama HD Orthos
Pros: Cons: Comments:I had given my older set of this line to one of the kids and I’ve missed them ever since. So I ordered the complete set recently and it was good to have them back! I compared them with TV Delos eyepieces in both an f7 80mm apochromat and a 12” f5 Dob and the results were stunning. On the Moon contrast was so very sharp with shadows completely black: no scattered light. Contrast on fainter objects like nebulas revealed greater internal detail so low level contrasts were better rendered as well. Although I love the Delos series and need it for wider FOVs the Fujiyama HDs give the best performance at least down to f5.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Dec 24, 2016Good value, well made.
Pros: Cons: Comments:I use this ep alone, or with a 2x or 3x Barlow. Optics seem very good, good contrast. One can pay double or triple the price for a wider FOV, but I've found Ortho's to be excellent for planetary surface contrast, where wide FOV Isn't important.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Jan 31, 2015An Excellent Execution of the Abbe
Pros:Compact,Quality Lenses,Accurate,Lightweight
Cons: Comments:I have 5 of the KK Orthos (7~25mm) and they are all superb, both optically and mechanically. In this era of large, heavy and expensive widefield eyepieces, I'm delighted that someone in Japan is still producing an excellent Abbe. Kudos to Agena for bringing them to the States.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Sort bySpecifications
Apparent Field of View 42° Barrel Size 1.25" (31.7mm) Bolt Case Included Yes - Free Agena Eyepiece Container Bolt Case Size Agena 37x60mm Coatings Multi-Coated Design Abbe Orthoscopic Height (without Eye Guard) 2.03" (51.5mm) Max Width 1.34" (34.0mm) End Caps 2 Eye Lens Diameter 0.63" (16.0mm) Eye Relief by Design 15.2mm Field Stop Diameter 12.5mm Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6) Focal Length 18mm Lens Elements 4 Lens Groups 2 Parfocal Yes Rubber Eye Guard No Blackened Lens Edges Yes Manufacturer Kokusai Kohki Eyepiece Focal Length 15.1mm - 20mm Eyepiece Field of View Up to 50 degrees Eyepiece Series KK Fujiyama HD Ortho Barrel Type Smooth sided
