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Explore Scientific 2" 82° Series Nitrogen-Purged Waterproof Eyepiece - 18mm
| Brand | Explore Scientific |
| Part Number | EPWP8218-00 |
| Availability | |
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Product Info
Manufacturer Description
Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 82° 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° 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.
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° 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.
Explore Scientific's eyepieces are backed with their exclusive Explore STAR Transferrable Extended Life of the Product Warranty. Limited Warranty is one year, which converts to the Explore STAR Transferrable Extended Life of the Product Warranty when product is registered within 60 days of purchase. We think that you will find Explore Scientific eyepieces rank among the finest obtainable and represent an outstanding value.
Reviews
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Sep 30, 2016
Excellent Eyepiece!
Pros:Easy to Use,Strong Construction,Quality Lenses,Accurate
Cons: Comments:I love ALL of the ES EP's. I currently have 6 of them. They are all quality pieces that are built very well. Some people will take 1 star away from reviews because the EP is not flat to the edges. But this is not a high premium EP. This is more like an Upper Middle Class type EP. So, to me, some slack has to be given.
Bottom Line: Would you recommend this item? Yes
One trick I was taught was to focus 1/2 way in from the edge. This will trick your eye into seeing everything in focus.This review was provided courtesy of AgenaAstro.com
Jul 4, 2015Great widefield views
Pros:Strong Construction,Quality Lenses
Cons: Comments:Good contrast, crisp images, and that expansive wide field of view. I have really enjoyed using this EP in both my 5" refactor and 8" reflector. It's a substantial upgrade from the basic plossl EPs I had been using. Once you get used to the wide FOV its hard to go back.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Jun 13, 2014Lightweight & Compact is Good!
Pros:Quality Lenses,Easy to Use,Lightweight,Compact
Cons: Comments:I purchased for Compact-Bino-telescope. Very Easy Balance than the Other Heavy Eyepieces.
Bottom Line: Would you recommend this item? NoThis review was provided courtesy of AgenaAstro.com
Jun 13, 2014A good eyepiece
Pros:Easy to Use,Quality Lenses,Strong Construction
Cons: Comments:I bought this eyepiece for my Dob 10" F/4.7. I have not been disappointed. Good design, sharp, eye relief enough (if no glasses). Very low aberration.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Nov 29, 2013Great eyepiece
Pros:Great clarity,Strong Construction,Quality Lenses
Cons: Comments:I bought this eyepiece wanting to have something better than the stock eyepieces that came with my 10" dob. I have not been disappointed. The field of view is terrific and the stars are pinpoint sharp. I have found objects in the nighttime sky which I had no chance to find with my Plossl eyepieces. I will certainly buy others in the future.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Oct 1, 2013ES 2" 18mm 82
Pros:Quality Lenses,Easy to Use,Strong Construction
Cons: Comments:This is like all the ES eyepieces that I own: absolutely great in my F/10 scopes. Great view, sharp, great contrast, and good eye relief. And all this at a great price. What more could you ask for?
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Sep 27, 2013A good eyepiece
Pros:Easy to Use,Strong Construction,Quality Lenses,Accurate
Cons:Small Eye Relief
Comments:Residual aberrations eyepiece
Bottom Line: Would you recommend this item? Yes
When the lens 1:4. Excellent image of a luminous point on the axis of less than 6 arc. minutes. In the zone (70% of the center to the edge) image of the star increases to 9 arc. minutes due to astigmatism. On the edge (one and a half degrees from the rather sharp image edges diaphragm) aberration spot elongated in the direction of the meridian has a size of about 11 arcmin. minutes. Seen a little chromatism blue to the center of the field of view (smaller than most of the aberration spot).
When the lens of 1:10. Axial point becomes even narrower (less than 4 arcmin. Minutes). Field aberrations are reduced to 6-9 arc. minutes.
Glare is not checked, the sharp edge of the field diaphragm.
The eye has pretty much pressed to the eyepiece. "Bean vignetting" appears minimal distortion hues not seen. There is the effect of "Ring of Fire" because of the chromatic position in the exit pupil.
Although not a very handy little eye relief, deservedly considered the eyepiece can be located in a number of excellent eyepieces. It can be effectively used for examining the nebulous objects and star clusters in the most high-aperture telescopes.This review was provided courtesy of AgenaAstro.com
Jul 30, 2013Great eyepiece!
Pros:Strong Construction,Accurate,Quality Lenses
Cons: Comments:The 82 degrees is a great field of view for nebula observing! The clarity is awesome and the stars remain sharp to the edge. Is very comfortable for the eye and the price is very good for the quality offered!
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
Feb 19, 2013The most successful of the 82* series
Pros:Sharp,Ultra Wide Angle,Target,Quality Lenses,Modern Technology,N2 Waterproof,Strong Construction
Cons: Comments:On my 10" newton telescope this purchased ES18 eyepiece works well.
Bottom Line: Would you recommend this item? Yes
The mechanical design is at a very good level. For Deep Space Objects I seen neutral image color, contrast and incredibly sharp. Excellent eyepiece! Stars sharp in almost the entire field of view. Jupiter is a perfect ball from broken belts. His moons are pointed. I can't find any reflections or glare.
Generally eyepiece seems to be a clear, neutral colors and well-adjusted in almost all fields. For me it's a target average-focal eyepiece. As you can see Explore Scientific Company has a very good quality and affordable products.This review was provided courtesy of AgenaAstro.com
Sort bySpecifications
Apparent Field of View 82° Barrel Size 2" (50.8mm) Bolt Case Included Discontinued Item Bolt Case Size Agena 65x80mm Coatings EMD (Enhanced Multilayer Deposition) Coatings Design 6 or 7 Elements; Combination of: Dense Crown, Light Crown, Dense Flint, and Lanthanum Optical Glasses End Caps 2 Eye Relief by Design 13mm Filter Threads Standard 2" Filter Thread (M48 x 0.75) Focal Length 18mm Lens Elements 6 Lens Groups 4 Rubber Eye Guard Rubber Folding Type Blackened Lens Edges Yes Additional Information Body: Anodized Black Aluminum; Laser-Etched Description and Serial Number; Rubber Grip: Internally O-Ring Sealed and Nitrogen Purged
Barrel: Stainless-Steel, Double Taper, Accepts Standard FiltersManufacturer Explore Scientific Eyepiece Focal Length 15.1mm - 20mm Eyepiece Field of View Over 80 degrees Eyepiece Series Explore Scientific 82° Barrel Type Tapered barrel Eyepiece Weight 13.20oz (374.21g)
