Or know anything about the design and/or origins? Edited by 25585, 06 March 2023 - 09:04 AM. They slap on the "15mm" on the side and everybody assumes it is actually 15mm, when it is really 14mm. Good correction comes with a price. Some people love the porthole views of 100-degree eyepieces, and others like me would rather have a cozy field stop that's easy to take in with long eye relief. Optical performance is also identical and excellent for the money. $65 a piece is very cheapfor these eyepieces, so you did a very good deal there. Alan Dyer is an astrophotographer and astronomy author based in Alberta, Canada. and even less can be tolerated in condition of tacking mount. Good decision! Please note: Internationally, grading systems used at institutions of higher educations may differ substantially. In this complete system we include the large 28mm 2" wide field eyepiece for low power, the 8mm ultra-wide angle eyepiece for medium power, and for high power we provide the 4 mm ultra-wide angle eyepiece. On axis the field is nice but as you creep out from the center the curvature becomes apparent. His website at www.amazingsky.com has galleries of his images, plus links to his product review blog posts, video tutorials, and ebooks on astrophotography. I don't know how much help my opinion will be but I will certainly share what I can when I have them in front of me. This is the largest and heaviest of the 1.25-inch eyepieces, with a mass of 400 grams. As for "triple testing" eyepieces, that I seriously doubt happens. At under $200 this eyepiece is a great way to get those wide views at a reasonable price. And the included velvety storage bag is very nice. Waiting Period: We are in continuous production and operate one year in advance. It's all part of the marketing game. Though advertised as 82, Celestrons 15mm Luminos had an apparent field between that of the 76 Morpheus and the other 82 models. While the rubber eyecup can fold down, it is stiff enough that it is best left up. At 580 grams, it is the heaviest of the 82 set. Those look just like the WO UWANs, and they are in the exact same focal lengths. Looks like at this time they are all available. This is the original 100 eyepiece and is still the standard of excellence. However, the Omegon and Meade both have apparent fields closer to 90 as I measured it. Now I see all 3 at half price sale for under $300 for them and that's pretty good, imo! You currently have javascript disabled. Another good example is the 50mm finderscope, from both WO and SV (I have both, mostly the same, both excellent). Nice wide field. STELLARVUE OPTIMUS 20MM 100deg 2.0" 9-ELEMENT EYEPIECE Description Technical Specs Extended Information Stellarvue Optimus 20mm 100deg 2" 9-element eyepiece--lighter and sharper than its competition, this eyepiece redefines "wide" field. This is why some wide field EP's cost more, some, a lot more. This was part of a 3 piece set and I won't be using this one. Tight eye relief, a lot of field curvature, and edge-of-field brightening at f/10. Keep in mind, like appliances, or anything else, just because the OEM is the same, and they look the same on the outside, it doesn't mean they will always be the same on the inside. I have the Stellarvue 15mm UWA and it needs some focal length to clean up the field as curvature starts getting beyond tolerable for my eye around the 65-70% mark in an f/7 600mm refractor. Not saying that's a bad thing, just sort of distracting. Good luck and clear skies! Theres a new alternative for the Celestron NexStar SE and NexStar Evolution series tripod a short, foldable tabletop tripod. Introducing the Stellarvue Optimus eyepiece series. Eye relief is an excellent 17 mm, longer than in more premium models, and the eyecup is extendable. However, with your eye positioned where it needs to be to see the whole field, the field partially blacks out with squirming kidney-bean shadows (technically called spherical aberration of the exit pupil). He (or his expertly trained staff)machines optical tubes and adapters, polishes lenses, fabricates altazmounts, and yes his triple testing of his refractorsis now legendary! Astromania now sells a 32mm, but I suspect it is a 31mm Luminos. But then again, thats more or less the point the eyepiece gets out of the way so you no longer have the sense you are looking through a round porthole or window. Astronomy Clubs, Star Parties, Shows, & Conferences, Community Forum Software by IP.BoardLicensed to: Cloudy Nights, This is not recommended for shared computers. Its smaller, lighter, and cheaper than the bigger ASIAir Plus astrophoto computer, but is it as good? Click here to simulate the field of viewhttps://astronomy.tools/. Very fast shipping and packaging. A 100 degree field of view provides the user with almost 1.5 times the area of an 82 degree eyepiece. Why 5 stars? In short, I found it uncomfortable to use. The Stellarvue 82 is well made, with a compact, solid construction, good 14mm of eye relief (better than the stated 12mm) and a fold-up eyecup. I don't use 2" eyepieces that much so I'm not interested in the 28mm, and for some reason the 7mm eyepieces that I have are rarely used. 15mm Stellarvue is identical to the 14mm ES 82, field curvature and all, as noted above. Don't dismiss buying a used EP out of the Classifieds section - I found two of mine there. sold for a while and that line was 16, 8, 4. The focal length choices seems a bit odd to me: 28mm, 16mm, 7mm and 4mm, but perhaps more focal lengths will fill in the gaps later. The ergonomics of them is quite nice to me, fit the hand very well allowing for a good grip on them. Those I find are easiest to use. I ordered mine from Omegon and overseas delivery was prompt. I tested this set on f/6 apo refractors and f/5 to f/6 Newtonian reflectors, concentrating on comparing on-axis and off-axis sharpness. Edited by Someone4322, 06 March 2023 - 03:36 AM. I see only two, a 9mm and a 6mm. The 102 degree Nikon HWs are another good example. If the grading system of your university uses letter grades, you can assign a number to each letter grade. My bad experience with the 14 Meade put a bad taste in my mouth so I stuck to the big series 4000 version, and never gave the 5000s and axiom LX much thought even when I had access to try them whenever I wanted . For low power, large FOV, I recommend you limit the eyepiece focal length to ~35 mm (thus a 7 mm exit pupil.) Well, that was true until the Stellarvue 28mm / 82. The 4.5mm Morpheus is sharper than the Ethos SX, by a hair. It was definitely one of the better ones, as the 24uwa/es82 is, and likely the exact same optics. Like the Ethos, it can be used as either a 2-inch or 1.25-inch eyepiece. In the refractor, though, the 4.5 Morpheus comes into its own, with plenty of drift time with a focal length over 1100mm shorter. The new TS UWANs are waterproof and filled with nitrogen. Cons: Short eye relief and non-adjustable eyecup. Stars are sharp across all but the outer 15 percent of the field and are still tight at the edge, though with some lateral chromatic aberration. The 100 eyepiece tripod. The new PWA has an improved design with a standard fold-up rubber eyecup and good eye relief. And the 31 was the same as the 30uwa/82, but obviously marketed as a 31 nagler alternative. As good as these 82 eyepieces are, if your budget allows, you might want to consider an even wider 100 eyepiece. But I still prefer the Ethos SX on Uranus and Neptune because it gives me a much longer time between nudges and that allows me to relax more when looking. Probably not by much, if at all. No question they set the standard. 51,000 students. It's a great eyepiece. A year ago, they had 3 focal lengths of 82 eyepieces of 4, 7, and 16mm, and I reported them in the 2016 Guide to eyepieces. (1) it seems that for observer favorite FOV is defined by nature of human eye: 120-140 deg. Seeing the outer 10 degrees in direct vision is not so easily done. Either model represents an excellent value in a mega-wide eyepiece. Accessories, Astrophotography gear, Reviews. For some reason, uncle Al seems to have a monopoly on 13-16mm compact 82s that perform well in fast scopes as the 16 UWAN was the weak link in that line as well, but I don't remember ever trying the 16, or scrutinizing the 15mm axiom LX vs the 14 Meade or ES. Build quality 2nd to none.., relatively light for it's size.., but most of all the view is spectacular, all the way out to that wide 100 degree FOV. It just felt like a 68-degree field that was pushed slightly further out. Alan Dyer is an astrophotographer and astronomy author based in Alberta, Canada. They are probably another variation of the UWANs, thought the specified focal lengths have been changed from 7mm to 8mm and from 16mm to 15mm. They are still the best but are expensive. Several functions may not work. I tested nine brands of 82 eyepieces, all in the 13 mm to 16 mm range, a focal length that provides moderate power on most telescopes and so is suitable for all types of viewing. Buy all three of our high end 82 degree eyepieces and save! I strongly recommend both the 20 mm and 9 mm Optimus. Cons: Slightly soft off-axis performance. Returned it. It is likely KUO like the WP Meade UWA, who also make the UWAN/PWA. If so, you will need eyepieces with longer eye relief. This particular line saw its sales creamed by the superior ES 82s when the price on the latter was reduced. I am fortunate that I do not need to wear glasses.. Over the years, I have built up a collection of eyepieces that includes multiple sets. Like the Ethos, it can be used as either a 2-inch or 1.25-inch eyepiece. Pros: Lightest 100 with good eye relief. Bottom Line: Another fine ultra-wide eyepiece for the money. Introducing the new Stellarvue Ultra Wide Angle eyepiece series. I haven't used it in the field and it's pretty heavy but it's my best shot and easy access. eyepiece will limit observer significantly. The 16mm is often considered the weakest of the line (though still a decent performer) and I've read a lot of good things about the 4mm. This is not recommended for shared computers. The specifications state an 86 apparent field but it appeared to be the same as the other 82 models. Eye relief is a comfortable 13mm and theres no annoying kidney-bean shadowing of the exit pupil, true of the others in this group. Pros: Lowest cost eyepiece in the group; long eye relief. As such, the Nagler Type 6s are showing their age, as newer models of eyepieces, including Tele Vues own Delos series, provide adjustable eyecups and much longer eye relief, important for us aging observers! Today, they report 4mm, 8mm, and 15mm and are $50 apiece less expensive, at $149 each. Astronomy Clubs, Star Parties, Shows, & Conferences, Community Forum Software by IP.BoardLicensed to: Cloudy Nights. The jump from 50 to 70 provides a much larger leap than 70 to 100 to my eyes.
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