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 | Models : | By : Orion Orion 1.25" 45-degree Correct Image Prism Telescope Diagonal Features
- For terrestrial or titanic use, this diagonal produces a right-side-up, non-reversed image with strict daytime orientation
- Fully coated prisms for superior image fidelity and maximum light throughput
- Accepts 1.25" eyepieces, fits in 1.25" focusers
- Not recommended for use in Newtonian reflector or Dobsonian reflector telescopes
- Requires 5/8" more focus tour than typical star diagonals
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Orion 1.25" 45-degree Correct Image Prism Telescope Diagonal Overviews
For terrestrial viewing with a refractor or Cassegrain telescope, use of a correct-image (or image erecting) prism diagonal may be desirable. The image through the eyepiece image will appear upright and nonreversed, matching the naked-eye orientation. So a correct-image diagonal is important for terrestrial viewing with the above telescope types and is useful for expansive viewing for those that prefer to have the view through the telescope match the naked-eye orientation. We have three correct-image diagonals to pick from: a 45-deg 1.25" version, a 90-deg 1.25" version, and a 90-deg 2" model (with 1.25" collar). All are fully multi-coated and threaded for filters. Note that the 45-deg correct-image diagonal requires 5/8" more focus voyage than typical diagonals. Diagonals are not recommended for use in reflector telescopes.
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