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Orion Telescopes

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*2nd* 6.3mm Orion Sirius Plossl Telescope Eyepiece
This product is a 'Second'. Learn more
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  • This 6.3mm Orion Sirius Plossl eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptric
  • Superb 6.3mm focal length 1.25" eyepiece for high-power planetary and lunar observation in any telescope
  • Offers a 52° apparent field of view for clear, sharp views of impressively high contrast
  • Fully coated optics with magnesium fluoride on every air-to-glass surface to reduce reflection and increase light transmission
  • Eyepiece barrel threaded for use with 1.25" Orion filters


Item #  78739
  • Design
    Plossl
  • Eyepiece focal length
    6.3mm
  • Barrel size
    1.25"
  • Apparent field of view
    52.0°
  • 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
  • Case
    No
  • Weight (oz.)
    2
  • Dimensions
    1.4 in. x 1.3 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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