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 19 of 71 
Orion Telescopes

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20mm Orion Sirius Plossl Telescope Eyepiece
Was 
$47.99
Now 
$39.99
You Save 
$8.00
 
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In Stock
  • This 20mm focal length 1.25" eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains
  • 20mm telescope eyepiece excels at low power scanning of open star clusters and viewing of nebulas and larger galaxies
  • Offers a 52° apparent field of view for clear, sharp images of impressively high contrast
  • Multi-coated for excellent light transmission and bright, clear views
  • Plossl eyepiece design features 4 lens elements for clear, crisp views and high light throughput


Learn more
Item #  08733

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 52 apparent field of view, this 20mm 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 20mm Orion Sirius Plossl Eyepiece excels for moderately low power scanning of open star clusters and viewing of extended nebulas and larger galaxies.

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.

Product Support
Visit our product support section for instruction manuals and more
  • Design
    Plossl
  • Eyepiece focal length
    20.0mm
  • Barrel size
    1.25"
  • Apparent field of view
    52.0°
  • Eye relief
    13.0mm
  • Coatings
    Multi-coated
  • Number of elements
    4
  • Filter threads
    Yes
  • Parfocal
    No
  • Field stop diameter
    17.1mm
  • Barrel security recess
    No
  • Blackened lens edges
    Yes
  • Rubber eyeguards
    Yes
  • Body material
    Aluminum
  • Case
    No
  • Weight (oz.)
    3
  • Dimensions
    2.2 in. x 1.3 in.
  • Warranty
    One Year

Orders received by noon Pacific Time for in-stock item the same business day. Order 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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