Orion

Orion 6.3mm Sirius, 1.25" Plossl Eyepiece with 52 Degree Field of View.

SKU: ONSP63 MFR: 08739
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About the Orion 6.3mm Sirius

The Orion 6.3mm Sirius Plossl Eyepiece offeres a wide 52° apparent field of view which 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 6.3mm eyepiece is superb for high-power planetary and lunar observation and well suited to double-star viewing when stable seeing conditions permit.

Orion 6.3mm Sirius Features

  • This 6.3mm 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
  • Superb for high-power planetary and lunar observation

Orion 6.3mm Sirius Specifications

Design Plossl
Eyepiece focal length 6.3mm
Barrel size 1.25"
Apparent field of view 52.0-deg
Eye relief 4.1mm
Coatings Multi-coated
Number of elements 4
Filter threads Yes
Parfocal No
Field stop diameter 5.0mm
Barrel security recess No
Blackened lens edges Yes
Rubber eyeguards Yes
Body material Aluminum
Dimensions 1.4 in. x 1.3 in.
Weight (oz.) 2.07
Warranty Orion 1 year limited warranty
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