Orion 12.5mm Sirius, 1.25" Plossl Eyepiece with 52 Degree Field of View.

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$29.95
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Due to Manufacturer Restrictions, This Item can NOT be Shipped to California.

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About Orion 12.5mm Sirius

The Orion 12.5mm Sirius Plossl Eyepiece offers a wide 52° apparent field of view and provides extremely sharp images of impressively high contrast. It's ideal for all types of telescopes: reflector, refractor and catadioptric. The Plossl 4-element design is renowned for its outstanding performance and has become the standard by which all other eyepieces are judged. The Sirius Plossl optical system is fully coated with magnesium fluoride on every air-to-glass surface.

Lens edges are blackened to reduce scattering of stray light and maximize contrast. The lenses are mounted in black-anodized aluminum housings with a 1.25"-diameter chrome-plated brass barrel for durability and precision fit. The barrel is internally threaded to accept standard filters. The built-in rubber eyeguard enhances viewing by helping to block out ambient light and position the eye. This 12.5mm eyepiece, a useful intermediate focal length, performs well on both deep-sky and planetary subjects.

Orion 12.5mm Sirius Features

  • This 12.5mm eyepiece is ideal for all types of telescopes: reflector, refractor and catadioptric
  • Offers a 52 degree apparent field of view for clear, sharp images of impressively high contrast
  • Fully coated with magnesium fluoride on every air-to-glass surface
  • Performs well on both deep-sky and planetary subjects

Orion 12.5mm Sirius Specifications

Design
Plossl
Eyepiece focal length
12.5mm
Barrel size
1.25"
Apparent field of view
52.0-deg
Eye relief
8.1mm
Coatings
Multi-coated
Number of elements
4
Filter threads
Yes
Parfocal
No
Field stop diameter
10.2mm
Barrel security recess
No
Blackened lens edges
Yes
Rubber eyeguards
Yes
Body material
Aluminum
Dimensions
1.8 in. x 1.3 in.
Weight (oz.)
2.72
Warranty
Orion 1 year limited warranty
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