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Silver 1.25 inch telescope eyepiece with rubber eyeguard and grip ring

Tele Vue

Tele Vue 40mm Plossl 1.25" Eyepiece 40.0

SKU CH-FNKW-E0QXS

A 1.25" Plössl eyepiece with 40mm focal length, 43° apparent field and 28mm eye relief for comfortable viewing with glasses

  • TypeTelescopes
  • AccessoryEyepiece
  • Long eye relief of 28mm suits eyeglass wearers
  • 43-degree apparent field gives wide immersive views
  • Fully multicoated optics with blackened edges boost contrast
  • Parfocal design reduces refocusing when swapping eyepieces
  • High-index glasses sharpen edge-field performance across the view

40 mm Plössl 1.25" Eyepiece

This 1.25-inch eyepiece provides a 40 mm focal length for low-power, wide-field observing. Its 28 mm eye relief is designed for comfortable viewing with eyeglasses. The 43-degree apparent field delivers immersive views of large deep-sky objects and star fields.

Standard 1.25-inch barrel installation

The eyepiece slides into any standard 1.25-inch focuser or diagonal and secures with a thumbscrew. Rubber eyeguards fold down for eyeglass wearers and grip rings aid handling in cold or damp conditions. Safety undercuts prevent accidental drops if the locking screw loosens.

43-degree apparent field with 28 mm eye relief

The 40 mm focal length and 43-degree apparent field combine to frame large nebulae and open clusters at low magnification. Fully multicoated optics with blackened lens edges maximise contrast and suppress internal reflections. Parfocal design reduces refocusing when swapping with other Tele Vue Plössls. Eye relief shortens at higher powers, limiting comfort for eyeglass users with shorter focal length models.

Highlights

  • Long eye relief of 28mm suits eyeglass wearers
  • 43-degree apparent field gives wide immersive views
  • Fully multicoated optics with blackened edges boost contrast
  • Parfocal design reduces refocusing when swapping eyepieces
  • High-index glasses sharpen edge-field performance across the view

Specifications

TypeTelescopes
AccessoryEyepiece

Questions about this item

How do I know the 40mm Plossl is performing correctly after inserting it into my telescope?

You will see a sharp 43-degree apparent field with 28mm eye relief and noticeably less astigmatism and lateral colour at the edge compared with generic four- or five-element Plossls.

What comes in the box and what must I purchase separately?

The eyepiece includes rubber eyeguards, grip rings, filter threads and blackened lens edges; you only need to supply a 1.25" focuser or diagonal to use it.

Which Tele Vue Plossl focal length should I choose for the widest true field in a 1.25" barrel?

The 40mm focal length gives the lowest magnification and widest true field available in the 1.25" Plossl line, making it the best choice for large deep-sky objects.

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