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Orion Telescopes

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40mm Orion Sirius Plossl Telescope Eyepiece
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  • The 40mm Sirius Plossl 1.25" eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptric
  • Eyepiece offers a 43° apparent field of view for clear, sharp images of impressively high contrast
  • Multi-coated optics wfor excellent light transmission
  • Superb 40mm focal length eyepiece excels at wide-field surveying and detailed observations of large diffuse subjects
  • Threaded for use with all Orion 1.25" eyepiece filters


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Item #  08730

It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling telescope eyepieces. Quality this good usually costs a lot more.

Offering a wide 43 apparent field of view, this 40mm Orion Sirius Plossl Telescope Eyepiece 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 telescope eyepieces are judged.

The Sirius Plossl optical system is multi-coated for excellent light transmission and bright views. 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 telescope filters. The built-in rubber eyeguard enhances viewing by helping to block out ambient light and position the eye.

This 40mm telescope eyepiece yields the largest-possible field of view in a 1.25" barrel. It's superb for wide-field scanning and detailed observations of large diffuse subjects. Largest exit pupil and highest possible brightness.

Warranty

Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-676-1343.

  • Design
    Plossl
  • Eyepiece focal length
    40.0mm
  • Barrel size
    1.25"
  • Apparent field of view
    43.0°
  • Eye relief
    20.0mm
  • Coatings
    Multi-coated
  • Number of elements
    4
  • Filter threads
    Yes
  • Parfocal
    No
  • Field stop diameter
    28.5mm
  • Barrel security recess
    No
  • Blackened lens edges
    Yes
  • Rubber eyeguards
    Yes
  • Body material
    Aluminum
  • Case
    No
  • Weight (oz.)
    6
  • Dimensions
    3.7 in. x 1.6 in.
  • Warranty
    One Year

Orders received by noon Pacific Time for in-stock items ship the same business day. Orders received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

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