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

SKU: ONE9 MFR: 08921
Due to Manufacturer Restrictions, This Item can NOT be Shipped to California.
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$64.99 $3 per week
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About the 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
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