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TPO 40mm Plossl Eyepiece - 1.25"

SKU : OS-P40

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  • Design: Plossl
  • Focal Length: 40 mm
  • Apparent FOV: 52-degrees
  • Eye Relief: 6 mm
  • Size: 1.25" Barrel

Product Details

  • The Third Planet Optics four-element Super Plossl design eyepieces are among the most popular telescope eyepieces in the astronomy industry and will never disappoint in performance. With the combination of crisp viewing clarity, comfortable eye relief, and an apparent field of view of roughly 52 degrees, you'll be happy with the eyepiece for as long as you have it. This well manufactured Plossl delivers high contrast and pinpoint sharpness out to the edge of the field of view.

    Excellent Value Eyepiece

    For the amateur astronomer especially, these Plossl eyepieces are a great value. Each 4-element eyepiece is fully multi-coated for maximum contrast and has blackened lens edges to minimize internal reflections and the barrels are threaded to accept 1.25" filters.

    The TPO 40 mm Plossl Eyepiece is perfect for viewing large nebulae and star clusters.

      TPO Product Number: P40

    • specifications

      Accessory TypeEyepieces
      Dust Caps IncludedYes
      Eye Guard IncludedYes
      Eye Relief6mm
      Field of View 52 Degrees
      Focal Length40mm
      Optical CoatingsBlackened Lens Edges
      Optical CoatingsFully Multi Coated
      Warranty2 Year Warranty
    • included items

      • Design: Plossl
      • Focal Length: 40 mm
      • Apparent FOV: 52-degrees
      • Eye Relief: 6 mm
      • Size: 1.25" Barrel

    Product Reviews

    Customer Reviews
    4.8 Based on 5 Reviews
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    • exception
    • grip ring
    • eye cup
    • rubber
    • baffles
    • eyeglass wearer
    • budget lenses
    • Plossl Eyepiece
    • eye relief
    • observations
    A OPT Telescopes Customer
    Lawrence S.
    United States United States

    Sharp, Clean Glass, Quality Build

    This 40mm Plossl Eyepiece is used mostly for terrestrial viewing, but is bright and sharp enough for astronomical observations. The lenses have good contrast, are full and the eye relief is excellent, more than adequate for this eyeglass wearer, and much better than my other budget lenses. The internal baffles are well blackened and the construction is all metal with the exception of the checkered grip ring and rubber eye cup. It is fully coated, green coating reflections apparent both inside and out. This is an outstanding value and I'm very pleased with the purchase.

    Leroy M.
    United States

    Waiting With Anticipation!

    Mother nature hasn't been kind since I purchased this eyepiece. it's either been too cold or too cloudy. Will give my opinion after I'm able to use it.

    Terry S.
    United States


    Good eye relief and wide field of view.

    James R. Phelps

    great 40mm 1.25" eyepiece

    I was looking for a 1.25" eyepiece that would give me a wider FOV than what I currently get with my orion 6" starblast. all 40mm eyepieces I've experienced in the past were lucky to have about 43 or 45 mm AFOV, so I took a chance with this TPO with 52AFOV. I tried it out on the Pleiades and it was pretty sharp enclosing the entire cluster. it appeared to have a wider FOV than my TV 24 wide field, thopugh the overall star images in the 24 were a little sharper. But this TPO 40 does what I had hoped. Will probably get a couple more TPOs.

    United States

    40 mm eyepiece

    Have only used it once, but it is exactly what I needed.