Orion 9mm Expanse, 1.25" Wide Field Eyepiece with 66 Degree Wide Field of View.

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SKU: ONE9 MFR: 08921
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$64.99
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Orion 9mm Expanse: Picture 1 regular $64.99

About Orion 9mm Expanse

The Orion 9mm Expanse Eyepiece features 66° apparent field of view. It shows objects like the Andromeda Galaxy, the Double Cluster, or the star clouds in Sagittarius in one sweep. Expanse oculars have big eye lenses and great eye relief (13mm to 17mm). Eyeglass wearers can view the entire field without removing their glasses.

All eyepiece elements are fully coated, with the outer lens multi-coated for additional light transmission. Each 1.25" aluminum barrel is threaded for filters and internally blackened to eliminate internal scattering. And their fold-down rubber eyeguards enhance contrast by blocking stray light. The expanse eyepieces provides a super wide field of view and superior optical performance.

Orion 9mm Expanse Features

  • This 9mm eyepiece offers a wide field of view and superior optical performance at a bargain price
  • Great eye relief so eyeglass wearers can view the entire field without removing their glasses
  • Delivers sharp images with good color correction and contrast
  • Aluminum barrel is internally blackened to eliminate internal light scattering

Orion 9mm Expanse Specifications

Design
Ultrawide
Eyepiece focal length
9.0mm
Barrel size
1.25"
Apparent field of view
66.0-deg
Eye relief
15.0mm
Coatings
Multi-coated
Number of elements
6
Filter threads
Yes
Parfocal
No
Field stop diameter
15.0mm
Barrel security recess
Yes
Blackened lens edges
Yes
Rubber eyeguards
Yes
Body material
Aluminum
Dimensions
2.7 in. x 1.3 in.
Weight (oz.)
4.17
Warranty
Orion 1 year limited warranty
Mfr #
08921
SKU
ONE9
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