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Astro Hutech 1.25" Abbe Orthoscopic Eyepiece (Japan) - 18mm
| Brand | Astro Hutech |
| Part Number | OR18H |
| Availability | available |
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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
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Dec 7, 2013
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? YesThis 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) |
