Explore Scientific 30mm 82 Degree Waterproof Eyepiece - 2"



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Explore Scientific 30mm 82 Degree Waterproof Eyepiece - 2"

Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 82 Degree Series extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics.

The visual effect of these eyepieces with their long eye-relief and their 82-degree apparent field is truly a full-immersion experience. Your eye is relaxed, allowing you to easily use the "averted vision" technique to study faint details across a huge field-of-view. Just check out this animation of how Explore Scientific Eyepieces field of view works and read about how Scott Roberts uses them:

Each eyepiece is meticulously assembled into precision machined metal lens barrels that maintain the perfect alignment of the optical train for years of rugged use in the field. The 82-degree Series eyepieces come with a twist-up rubber eye-guard that raise to the desired height for the comfort of the observer, and as experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope. To keep internal reflections to a minimum, all internal surfaces of the eyepiece barrel are flat black, as well as the edges of the lenses themselves to minimize the scattering of light within the lenses themselves.

In today's modern telescope industry there are many fine companies to choose from manufacturing top quality eyepieces. Explore Scientific invites direct side-by-side comparison with any other eyepiece of similar design, and they back their eyepieces with a Lifetime Warranty. We think that you will find Explore Scientific eyepieces rank among the finest obtainable and represent an outstanding value.


OPT Product Number: ES-EPWP8230-01


Dust Caps IncludedYes
ER20mm or More
Eye Guard IncludedYes
Eye Relief21mm
Eyepiece OpticsWide Angle
Eyepiece Special FeatureWaterproof
Field of View82 degrees
Focal Length30mm
FoV 99 Degrees
Free ShippingYes
Lens Elements & Groups6 elements & 4 groups
ManufacturerExplore Scientific
ModelExplore Scientific 82 degree Waterproof
WarrantyLifetime Warranty
Customer Reviews
5.0 Based on 3 Reviews
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Aaron D.
United States
Best eyepiece I own

Absolutely love this eyepiece. Great wide field views with dark background. Sharp to the edges. This is the most frequently used eyepiece in my lineup.

Great value

I bought one of these to use on my 18" Obsession Classic and have been very impressed. It's nice and sharp and easy use (no blackout problems for me). I haven't put it up against a TV 31, but for the price this is hard to beat. Watch out for the lens cap on the bottom- my views started getting very "gauzy", which I at first attributed to poor optics. When I looked at the bottom lens it had what looked like a big greasy smudge. I cleaned it and it mysteriously reappeared after I replaced the bottom cap. Turns out it was FROM the bottom cap! I cleaned the eyepiece again, threw out that cap, replaced it with a spare TV cap, and the problem was solved.

Customer review

Outstanding performer with great contrast and pin-point stars to the edge of field even with fast f/5-f/6 optics. Easily the best bang for the buck in premium eyepieces of this focal length.