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Astro Hutech 1.25" Abbe Orthoscopic Eyepiece (Japan) - 18mm

5.0 (1 Reviews) Read Reviews Write Review
Brand Astro Hutech
Part Number OR18H
Availability available

Product Info

Manufacturer Description

Astro Hutech has resurrected the famed orthoscopic eyepiece series that was sold under the label of Kasai Trading Company of Japan for many years. These eyepieces are based on the classic Abbe Orthoscopic (3 + 1 element) design. The true Abbe Orthoscopic has long been recognized for its ability to deliver the highest resolution, contrast and light throughput of any modern eyepiece design.

The three cemented elements are hand-aligned by Japanese craftsmen. All components of this eyepiece, including all glass and other materials, are manufactured and assembled fully in Japan. 

Fully multicoated lenses provide clean, high-contrast images suitable for optimum planetary and lunar viewing. On-axis images are essentially perfect and the orthoscopic design ensures freedom from distortion. Contrast and throughput are maximized by its minimum of lens elements, coatings, and only 4 air-to-glass surfaces.

Features:

  • Fully multi-coated optics
  • 42 degree apparent field of view.
  • Eye relief: ~80% of focal length
  • Smooth-sided 1.25" eyepiece barrels

Reviews

5.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      Unknown
      Time with Product
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      User Notes:
      Review by Steve of Coldiron, KY.
      1386460800
      Dec 7, 2013

      5.0 Excellent Ortho

      Pros:

      Quality Lenses,Strong Construction

      Cons:

      Comments:

      Excellent quality ortho optic compares favorably with Baader Genuine Ortho which is no longer made, which is considered indistinguishable from the Zeiss Abbe Ortho, also no longer made.

      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 Discontinued Item
      Bolt Case Size Agena 37x60mm
      Coatings Fully 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 0.59" (15.0mm)
      Eye Relief by Design 14.4mm
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 18mm
      Lens Elements 4
      Lens Groups 2
      Rubber Eye Guard No
      Blackened Lens Edges Yes
      Manufacturer Astro Hutech
      Eyepiece Focal Length 15.1mm - 20mm
      Eyepiece Field of View Up to 50 degrees
      Eyepiece Series Astro Hutech Abbe Ortho
      Barrel Type Smooth sided
      Eyepiece Weight 3.10oz (87.88g)