Astro Hutech 1.25" Abbe Orthoscopic Eyepiece (Japan) - 5mm

Our Price: $109.00
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Out of Stock
Availability: Item has been discontinued by the manufacturer
Our Product ID: ZZE-ZZAH-OR05H
Manufacturer SKU: OR05H
Item Can Ship: Worldwide
Astro Hutech 1.25" Abbe Orthoscopic Eyepiece (Japan) - 5mm

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  • Astro Hutech 1.25" Abbe Orthoscopic Eyepiece (Japan) - 5mm
  • Astro Hutech 1.25" HC Abbe Orthoscopic Eyepiece (Japan) - 5mm
  • Astro Hutech 1.25" HC Abbe Orthoscopic Eyepiece (Japan) - 5mm

Availability: Item has been discontinued and is no longer available.

Product Details

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.


  • Fully multi-coated optics
  • 42 degree apparent field of view.
  • Eye relief: ~80% of focal length
  • Smooth-sided 1.25" eyepiece barrels
Eyepiece Series Abbe Orthoscopic
Focal Length 5mm
Barrel Size 1.25" (31.7mm)
Apparent Field of View (Mfg Specified) 42°
Eye Relief (Designed) 4mm
Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
Coatings Fully Multi-Coated
Lens Elements 4
Lens Groups 2
Blackened Lens Edges Yes
Barrel Type Smooth sided
Protective Plastic Storage Container Discontinued Item
Protective Plastic Storage Container Size Agena 37x60mm
Optical Design Abbe Orthoscopic
Height (Without Eyeguard) 1.50" (38.0mm)
Maximum Width 1.34" (34.0mm)
End Caps 2
Eye Lens Diameter 0.15" (3.9mm)
Weight 2.2 oz (62g)
Country of Manufacture Japan