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Black cylindrical 1.25 inch telescope eyepiece with silver barrel and rubber grip

Celestron

Celestron 40 mm Omni Plössl 1.25" Eyepiece 43° #93325

SKU CH-FGJK-STHYP

Provides a 43° view through a 40 mm Plössl with multi-coated optics and blackened lens edges

  • TypeTelescopes
  • Wide 43-degree field of view shows expansive night-sky vistas
  • 40 mm focal length delivers low-power views of large objects
  • 4-element symmetrical Plössl design yields sharp, well-corrected images
  • Blackened lens edges cut internal reflections for higher contrast
  • Multi-layer coatings on every surface boost light transmission

40 mm Plössl eyepiece for telescopes

The Celestron 40 mm Omni Plössl 1.25" eyepiece uses a 4-element symmetrical design with multi-layer coated lenses and blackened edges to deliver sharp, high-contrast views across a 43-degree field. It fits any standard 1.25-inch focuser and is built for amateur astronomers who want a wide, immersive window on deep-sky objects.

Ideal for low-power deep-sky sweeps

This eyepiece suits observers who want maximum true field for large nebulae, star clusters and the Moon at low magnification. It is not the right choice for high-power planetary detail, tight double-star splitting, or any situation where a narrower field and longer eye relief are preferred.

43-degree field with generous eye relief

The 40 mm focal length and 43-degree apparent field combine to give a wide true field that frames extended objects comfortably. At higher magnifications the exit pupil shrinks and the fixed eye relief becomes restrictive, so the eyepiece runs out of usefulness when you push power for small planetary features.

Highlights

  • Wide 43-degree field of view shows expansive night-sky vistas
  • 40 mm focal length delivers low-power views of large objects
  • 4-element symmetrical Plössl design yields sharp, well-corrected images
  • Blackened lens edges cut internal reflections for higher contrast
  • Multi-layer coatings on every surface boost light transmission

Specifications

BrandCELESTRON
TypeTelescopes

Questions about this item

Do I need a telescope with a 1.25" focuser to use this 40 mm Omni Plössl eyepiece?

Yes, the eyepiece barrel is 1.25 inches, so it fits any standard 1.25" focuser or diagonal on your telescope.

Can I keep using my existing 1.25" star diagonal with this 40 mm Omni Plössl?

Absolutely, the 1.25" barrel slides directly into any standard 1.25" diagonal you already own.

How can I confirm the multi-layer coatings are performing after I install the eyepiece?

Bright stars should appear as sharp points with minimal ghosting or coloured halos, and the 43° field should show even illumination to the edge.

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