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Pentax SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes

B&H # PEEP20X Mfr # 70516
In Stock
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You Pay: $275.00
Product Highlights
  • 70° Apparent Field of View
  • 20mm Eye Relief
  • Waterproof & Fogproof
  • Fits Pentax Spotting Scopes

Pentax premium spotting scopes adhere to the American standard of 1.25" eyepiece thread diameter, facilitating the use of eyepieces from independent manufacturers. That also means, of course, that the wonderful Pentax eyepieces can be used in other telescopes and spotting scopes which accept 1.25" eyepieces.

Pentax eyepieces are a near consensus choice amongst serious amateur and professional astronomers as the best that's out there, quite an accomplishment indeed given the fervent passion of the collective.

The XW line represents an even further improvement upon the venerable XL series. The apparent field of view has been expanded to a whopping 70°, but remarkably this was achieved without reducing their impressive eye relief of 20mm. There are eyepieces available with wider apparent viewing fields, but to take advantage of that wider field you'll have to be much closer to the eyepiece. This isn't exactly conducive to extended observing sessions. Additionally, there are lesser eyepieces with similar claims of 70° apparent viewing fields, but the performance upon the edge of these eyepieces isn't on par with the Pentaxes. If you're using a telescope with a fast aperture, this is of particular importance.

These are large and expensive eyepieces, but that's the price to pay for such an enviable combination of viewing field and eye relief. Buy the best once, and you'll still be enjoying the quality long after you've forgotten the price. Should you ever need to painfully part with your purchase, the best always has the most liquidity on the used market because they're rarely ever offered.

Continuous helicoid eyecup design gives perfect eye relief for all
Accepts conventional 1.25" diameter filters for astronomical and terrestrial applications
Perfect for digiscoping when combined with PF-DS1 adapter(and appropriate Pentax Optio digital camera)
Magnification 25x with the PF-80ED
26x with the PF-80ED-A
31x with the PF-100ED
Angle of View 2.8° with the PF-80ED & PF-80ED-A
2.3° with the PF-100ED
Field-of-View (@ 1000 Yds) 147' (49 m at 1000 m) with the PF-80ED & PF-80ED-A
118' (39 m at 1000 m) with the PF-100ED
Exit Pupil Diameter 3.2mm
Eye Relief 20mm
Relative Brightness 10.2
Twilight Factor 44.7 with the PF-80ED & PF-80ED-A
55.7 with the PF-100ED
Weatherproofing Waterproof & fogproof
Dimensions 2.4 x 3.4" (61 x 86mm) WxH
Weight 0.78 lb (355 g)
Pentax SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes
  • Push-On Front & Rear Caps
  • Plastic Helicoid Case
  • Limited Lifetime Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes
     
    4.8

    (based on 4 reviews)

    Ratings Distribution

    • 5 Stars

       

      (3)

    • 4 Stars

       

      (1)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Great optics (3)
    • Strong construction (3)

    Cons

      Best Uses

          • Was this a gift?:
          • No (4)

        Reviewed by 4 customers

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        Displaying reviews 1-4

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        5.0

        Pentax Rules!

        By Al

        from Tucson, AZ

        About Me Avid Adventurer

        Verified Buyer

        Pros

        • Easy To Use
        • Great Optics
        • Strong Construction
        • Widely Compatible Adapter

        Cons

          Best Uses

          • Astronomy
          • Terrestrial Viewing

          Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:

          This is a great all around eyepiece! Sharp images and high quality with a great warranty. I tried it in my spotting scope during the day for bird watching and it gave me a great widefield image. Forget the zooms especially in hot climates you will get too much mirage, this is the eyepiece to use for nature lovers everywhere! At night it doubles as a superb widefield astronomy eyepiece that will give you detailed images of nebulas, star clusters, and galaxies. Put a barlow on it and you have a great planetary eyepiece for high magnification. If you only have room for one eyepiece this is the one to get. And B&H shipped fast and was very reasonable. This eyepiece uses a standard size for many spotting scopes and telescopes which gives it versatility. The long eye relief is great for eyeglass wearers and it is very comfortable to use in long viewing sessions.

          • Was this a gift?:
          • No

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          5.0

          great all around eyepiece

          By rbs

          from central IL

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Great Optics
          • Strong Construction

          Cons

            Best Uses

              Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:

              I bought this scope and the 20mm eyepiece for target shooting. It offers excellent optics, great field of view, and long eye relief. It is the perfect eyepiece for this scope, exceptional glass.

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              4.0

              Decent match for pf 80ed spotting scope

              By STK

              from Arcata, CA

              Verified Buyer

              Pros

              • Easy To Use
              • Good Padding
              • Great Optics
              • Strong Construction
              • Widely Compatible Adapter

              Cons

                Best Uses

                • Terrestrial Viewing

                Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:

                A decent all round match with the 80mm pentax spotting scope but if higher magnification is needed to see small things like leg band colors on birds a higher magnification would be recommended.

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                5.0

                Superlative Eyepiece

                By Rob

                from Santa Barbara, CA

                About Me Casual/ Recreational

                Verified Buyer

                Pros

                  Cons

                    Best Uses

                      Comments about SMC XW 20mm Wide Angle Eyepiece (1.25") - 19x w/ 65mm, 25x with 80, 31x with 100mm Pentax Scopes:

                      This is "la creme de la creme" of all Pentax xw eyepieces. My review is based on terrestial observation with a Pentax PF 80 ED scope. I have all four eyepieces 20-14-10-7. I bought this one last (Stupid!) and I can assure you it definitely surpasses the other ones by a long shot, the 14 comes second followed by the 10 and the 7 with less honors pushing the scope to the limit in magnification for practical uses. Buy the 20 first followed by the 14. The 10 is pretty good, the 7 the lacks the brightness of the others and is unusable when the slightest weather turbulance is present but nice to have for those picture perfect clear days.

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