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William Optics 1.25" SPL Series Eyepiece - 3mm

4.6 (5 Reviews) Read Reviews Write Review
Brand William Optics
Part Number E-SPL3
Availability available

Product Info

Manufacturer Description

William Optics is proud to introduce the SPL (Super Planetary Long eye-relief) eyepieces. This new Planetary Eyepiece series is designed for users with needs of a high-power, sharp and contrasty views for planetary observations. The long eye relief is a bonus for people with eyeglasses and for people who do not want to strain their eyesight during observing sessions.

High Quality Optical Lens

  • Special glasses and perfect multi-coatings make the optical performance of SPL eyepieces amazing in almost any telescope. A very well corrected field of view, free from optical aberrations allows you to finally enjoy planets as they deserve.
  • Good transmittance and excellent color rendition will allow you to enjoy planetary details you had missed so far.
  • Leave ghosting and flares to other eyepieces: your William Optics SPL will not disappoint you.

High Power and High Contrast

  • Available in three focal lengths, 3mm, 6mm, and 12.5mm, these eyepieces will satisfy any power requirement. Easy to barlow, they will yield amazing results even at the highest powers (provided that atmospherical conditions and your telescope can hold such high powers!).
  • Great contrast and sharp to the edge.
  • Distortion-free extra details is not a miracle: it all goes down to quality construction and design. SPL give you just what you always wanted.

Long Eye Relief

  • All three focal lengths boast very long eyerelief for maximum view comfort even for eyeglass wearers.
  • Mechanically beautiful and functional tapered barrel.
  • Blackened lens edges and flat black paint in the barrel to minimize sources of potential reflections.

Excellent value

  • The very competitive price of these planetary eyepieces will encourage you to get the whole series to add to your collection!

Reviews

4.6 (Based on 5 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      User Notes:
      Review by Rene R.
      1501916282
      Aug 4, 2017

      5.0 Excellent 3mm Eyepiece

      Pros:

      Cons:

      Comments:

      The Williams Optics 3mm has proved itself to be a great addition to my set of eyepieces. It maximizes the magnification for my AT 72mm refractor to 144x and it delivers a clear sharp image of double stars that are 2 arcseconds apart. It's a quality product for a very reasonable cost of $108.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Vit of RU.
      1380326400
      Sep 27, 2013

      5.0 Excellent eyepiece!

      Pros:

      Quality Lenses,Lightweight,Compact,Accurate,Strong Construction,Easy to Use

      Cons:

      Do Not Have

      Comments:

      As in the center and along the field both 1:4 and 1:10 for - anything but rather regular pattern diffraction pattern Erie. This is partly to be explained very small focal length of the eyepiece, but also shows the high quality of correction of aberrations. Not bad for this "gray horse" from Taiwan. Eyepiece shows a significant positive distortion. Moderate glare. Chromatism is not noticeable. Eye relief for the observations in glasses is not enough, but without the glasses - quite convenient.

      Compared to 4 mm eyepiece radians has a slightly larger light scattering and a real comfortable eye relief. But then the price is more than half the size!

      A great short throw downsider for "fast" Newtonian, and for moderate luminosity apochromats - recommend.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      User Notes:
      Review by Ken of Norwalk, CA.
      1371513600
      Jun 17, 2013

      4.0 Excellent Eyepiece at Reasonable Cost

      Pros:

      Great Eye Relief,Lightweight

      Cons:

      Comments:

      While one could get higher power with a Barlow (I have a Televue "Big Barlow") the ease and weight saving by going to a short FL eyepiece cannot be overlooked. Since getting this eyepiece, I've been viewing Saturn most nights the skies are open. The views offered with this eyepiece are exceptional, particularly at this price point. You cannot go wrong picking up one of these guys.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      User Notes:
      Review by frank of concord, NH.
      1362528000
      Mar 5, 2013

      5.0 High power at its best

      Pros:

      Quality Lenses

      Cons:

      Comments:

      Best used on a short focal length scope. I read a review for the explore scientific 80mm triplet (which I own), the reviewer used this eyepiece. Could not be happier with the results. Crystal clear views of the tightest double stars

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      User Notes:
      Review by Bob of Bay Area, CA.
      1243382400
      May 26, 2009

      4.0 Nice solid eyepiece at a great price

      Pros:

      Cons:

      Comments:

      The WO 3mm SPL is a nice eyepiece. It offers generous eye relief and good high power views. The price at Agena astroproducts beat everyone and having bought from them before I knew the sale would be great again. Definitely a good deal.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Specifications

      Apparent Field of View 55°
      Barrel Size 1.25" (31.7mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      Bolt Case Size Agena 52x120mm
      Coatings Fully Multi-Coated
      End Caps 2
      Eye Relief by Design 20mm
      Focal Length 3mm
      Lens Elements 7
      Lens Groups 4
      Blackened Lens Edges Yes
      Manufacturer William Optics
      Eyepiece Focal Length 5mm and Under
      Eyepiece Field of View 51 - 60 degrees
      Eyepiece Series William Optics SPL
      Barrel Type Tapered barrel
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Eyepiece Weight 7.05oz (200g)