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Kokusai Kohki 1.25" Fujiyama HD-OR Orthoscopic Eyepiece (Japan) - 25mm

5.0 (3 Reviews) Read Reviews Write Review
Brand Kokusai Kohki
Part Number HD-OR 25mm
Availability available

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

5.0 (Based on 3 Reviews) 100% of reviewers recommended this product.
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    1. Ronald Zincone

      Ronald Zincone New Member

      Skill Level
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      Time with Product
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      User Notes:
      Review by Ronnie Z.
      1497011935
      Jun 9, 2017

      5.0 Highly recommend!!!

      Pros:

      Cons:

      Comments:

      These Fujiyama HD orthos are superb lunar and planetary eyepieces which I highly recommend.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by JimOfOakCreek of Oak Creek, WI.
      1412380800
      Oct 3, 2014

      5.0 There is no eyepiece that is sharper.

      Pros:

      Razor Sharp,Cool White Presentation,Maximum Light Throughput,Lightweight,Quality Lenses

      Cons:

      43 Degree Fov,Short eye relief

      Comments:

      Agena shipped the 4mm, 6mm and 25mm to my door in the MidWest in two days. These eye pieces are as sharp as money can buy. Their simple design means they have high light throughput due to fewer glass elements. I like the cool white, bright presentation. Solid high quality construction.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

      Skill Level
      Unknown
      Time with Product
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      User Notes:
      Review by desertlens of NM.
      1390867200
      Jan 27, 2014

      5.0 Thanks to KK

      Pros:

      Quality Lenses,Lightweight,Strong Construction

      Cons:

      Comments:

      A very well made Abbe. Construction quality (blackening, baffling etc.) is well above average. Optical quality is also fine with excellent clarity to the sharp field stop and very low scatter. I'm pleased to see the continued production of well executed Japanese orthos.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Specifications

      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) 2.29" (58.2mm)
      Max Width 1.34" (34.0mm)
      End Caps 2
      Eye Lens Diameter 0.83" (21mm)
      Eye Relief by Design 22.2mm
      Field Stop Diameter 17.4mm
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 25mm
      Lens Elements 4
      Lens Groups 2
      Parfocal Yes
      Rubber Eye Guard No
      Blackened Lens Edges Yes
      Manufacturer Kokusai Kohki
      Eyepiece Focal Length 20.1mm - 30mm
      Eyepiece Field of View Up to 50 degrees
      Eyepiece Series KK Fujiyama HD Ortho
      Barrel Type Smooth sided