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Explore Scientific 2" 92° Series Long Eye Relief Argon-Purged Waterproof Eyepiece - 17mm

5.0 (1 Reviews) Read Reviews Write Review
Brand Explore Scientific
Part Number EPWP9217-01

Product Info

Manufacturer Description


Explore Ultra-Wide Eyepieces - Comfort, Quality, Value.

The 92° LE series Waterproof eyepieces provide a hyper-wide apparent field of view with long eye relief for comfortable viewing that immerses you in vast expanses of the star-studded sky.

The Explore Scientific 92° Series eyepieces are hyper-wide class oculars that can transform your visual astronomy experience. You may be startled at the amazingly wide expanse of inky black sky you behold the first time you bring your eye to a 92° Series eyepiece. And after a while, you may even forget that you have an eyepiece between you and the universe! With an apparent field of view that is close to the maximum for hyper-wide eyepiece design, objects are not only easier to locate, but for non-driven telescopes the object will stay in the field of view for a very long time before any adjustments need to be made.

Another great benefit of hyper-wide eyepieces is the ease with which you can gaze, not directly at an object, but slightly to either side. This skill, called using averted vision, is especially helpful when observing faint objects, because using averted vision puts the image on a part of your eye that is more sensitive to light, allowing you to see fainter images.

Explore STAR Unlimited Lifetime Warranty

All Explore Scientific eyepieces registered within 60 days of purchase are protected by Explore Scientific's exclusive, fully transferable unlimited lifetime warranty to guarantee your satisfaction.


5.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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      User Notes:
      Review by Steven Y.
      Jan 3, 2018

      5.0 Marked Improvement In Contrast




      I tried this eyepiece out at the Peach State Stargaze courtesy of ES. I compared it to the ES 100, 13 and 20 mm eyepieces as well as to my Leica Zoom set at 17mm. The thing that stands out about the 92 is the marked increase in transparency over the other contestants. Backgrounds were blacker with the 92 and DSOs stood out a bit more brightly. Eye placement is a trifle tricky and takes a little while to get used to. The eyepiece would really benefit from a twist up eyecup as opposed to the nearly useless flip up rubber one. Eye relief is ample for glasses.
      In sum, I sold all my ES 100s and bought the 12mm 92 as well. I’m anxiously awaiting the promised expansion of the line in 2018!

      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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      Apparent Field of View 92°
      Barrel Size 2" (50.8mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      End Caps 2
      Eye Relief by Design 20mm
      Field Stop Diameter 27.5mm
      Filter Threads Standard 2" Filter Thread (M48 x 0.75)
      Focal Length 17mm
      Rubber Eye Guard Rubber Folding Type
      Blackened Lens Edges Yes
      Manufacturer Explore Scientific
      Eyepiece Focal Length 15.1mm - 20mm
      Eyepiece Field of View Over 80 degrees
      Eyepiece Series Explore Scientific 92° LE
      Barrel Type Tapered barrel
      Bolt Case Size Agena 85x120mm