I find that the longer the focal length of the scope, the more I wanted wider apparent fields. For Messier 24 ("Delle Caustiche") even in short focal scope 100 deg. That makes swapping eyepieces at high magnifications easier. If the grading system of your university uses letter grades, you can assign a number to each letter grade. Omegon in Germany offers many unique products such as their Panorama2 eyepieces. In the AD8 . Call us at: 530 823 7796 Open Mon-Fri 9-5 Pacific Time, 3. Most suffer from variable plossl, svbony, SVBONY Zoom Eyepiece, Zoom eyepiece. Im hoping these will perform similarly. With the 20 mm I will then have 32, 20, 16 and 10 mm equivalents. I tested these on f/6 apo refractors and f/5 to f/6 Newtonian reflectors, concentrating on comparing on-axis and off-axis sharpness. The TeleVue eyepieces are very sharp across the field, the Astro-Tech eyepieces slightly less so but they provide essentially the same views, just not quite so perfect. You will get more use out of middle and low magnification EP's now. Those look just like the WO UWANs, and they are in the exact same focal lengths. It's the same at low power, which Ernest just pointed out. Now I see all 3 at half price sale for under $300 for them and that's pretty good, imo! They slap on the "15mm" on the side and everybody assumes it is actually 15mm, when it is really 14mm. Bottom Line: Economical but with optical flaws. Back in my youth I worked for a company that "made" computer monitors and the OEM was required to make it to our specs, but others were not. An important factor is whether you have astigmatism in your observing eye and need to wear glasses when observing,. Old, from WO. Click here to create one. 15mm Stellarvue is identical to the 14mm ES 82, field curvature and all, as noted above. Thanks for the input, I appreciate it. Either model represents an excellent value in a mega-wide eyepiece. I think they are made by the same company that made other brands, Orion, Zhumell, SmartAstronomy, et al. Crappy skies so I havnt used them yet. I started with the A-T and would still have it if my wife did not wear glasses (I'm guessing it's only a matter of time for me as well). Certainly a keeper. A+ is the highest possible grade, and the lowest grade to pass a course is D. So if you assign numerical values in ascending order starting with 1, the input for the grade conversion is as follows: In the conversion tool, you enter 1as maximum grade (corresponding to A+), and 5 asminimum passing grade (corresponding to D). I still focused on the field stop and never got the spacewalk views others enjoy. This is a superb eyepiece for the money, with the bonus of argon-filled waterproof construction to keep moisture from penetrating and fogging the eyepiece on humid nights. At TUM, grades from 1 to 5 are assigned. But it just matters on if you need the eye relief or not, the AT UWA 28 would be great as well if not wearing glasses. public University. The tool will then calculate your grade in the German grading system. The field is so wide it can be hard to see the edge of the field. 70 is fine at low power, 78-85 fine at medium power, but I prefer 110 at high power. Its long 20mm of eye relief, screw-up eyecup and large eye lens makes Orions Lanthanum a pleasure to use. Pros: Good off-axis sharpness and eye relief, but . Click here to simulate the field of view, 3. Eyepiece Field of View - Apparent: 82 Eyepiece Focal Length: 8 mm Eyepiece Eye Relief: 12 mm Eyepiece Series: Stellarvue Ultra Wide Angle Eyepiece Weight: 6.5 oz. I missed the 16mm and regretted it as it's a very useful focal length. Edited by betacygni, 05 March 2023 - 10:45 AM. My conclusion from testing this 82 group was that the Explore Scientific came very close to matching the standard-setting premium Tele Vue Nagler, but at a lower price. Please re-enable javascript to access full functionality. These are $65 or so.., Observing in Northern/Southern Michigan, USA, The NEAF Report from nPAE Precision Astro Engineering. Old thread, but thought I would ask here first just in case instead of starting something new Stellarvue is running a sale on a 3 piece set of their 82 degree eyepieces for $292 while ES 82's are on sale for $99 each. Today, they report 4mm, 8mm, and 15mm and are $50 apiece less expensive, at $149 each. I doubt Vic Maris will reveal who his OEM is. Most suffer from variable plossl, svbony, SVBONY Zoom Eyepiece, Zoom eyepiece. When using hand driven alt-azimuth mounts this generous field will be appreciated. I did sell a lot of axiom LXs though, and owned the 23mm for a while and was impressed with it. But the soft eyecup nicely places your eye where it needs to be with no kidney-bean blackout. I haven't used it in the field and it's pretty heavy but it's my best shot and easy access. I can easily watch a close double drift past the field stop of a type 6 Nagler and often do. Alan Dyer is an astrophotographer and astronomy author based in Alberta, Canada. Good decision! Stellarvue 8mm UWA 82 degree eyepice that has never been used. I find the 82 degree fields of my Explore Scientific 9mm to be less accessible, though it is a nice sharp view. Introducing the new Stellarvue Ultra Wide Angle eyepiece series. And it is just for 2-inch focusers and so requires 2-inch filters. You currently have javascript disabled. The eyepiece is turned my 115 into a whole new scope for visual observing. LMU - Ludwig-Maximilians-Universitt Mnchen. Thus my max AFOVs are; 2.5 is 45 degrees, 3.5 is 65, 4 is 45 degrees, 4.5 is 76 degrees, 5 and 5.2 are 65 degrees, 6.5 is 76 degrees, 7 and 8 are 65 degrees, 9 is 76 degrees, 10 is 70 degrees, 12 is 92 degrees, 13 is 65 degrees, 14 is 80 degrees, 15 is 62 degrees, 17 is 92 degrees, 18 is 62 degrees, 20 is 80 degrees, 22 is 82 degrees, 25 is 60 degrees, 26 is 62 degrees, 28 is 68 degrees, 30 is 80 degrees, 31 is 82 degrees, 34 is 68 degrees, 40 is 70 degrees, 55 is 50 degrees. Our EOP eyepieces are now loaded into AstronomyTools database and application. F/7 is more forgiving than faster scopes so that does help. Bottom Line: A good, economical choice for Schmidt-Cassegrains. I test ZWOs new ASIAir Mini. The 9mm Optimus was tack-sharp across the 100 FOV. With the eyecup folded down it can be used with eyeglasses, but only just. 51,000 students. Though advertised as 82, Celestrons 15mm Luminos had an apparent field between that of the 76 Morpheus and the other 82 models. Cool, thanks for the info! 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. I like short UWA's as I only use muscle drive mounts, and I don't have a UWA in 4mm. Munich, German Mnchen, city, capital of Bavaria Land (state), southern Germany. Have fun experimenting! any limitations are just limitations and can not be named "favorite", (2) acceptable (not a favorite) eyepiece AFOV depends from nature of observing object. Converted grades are calculated using the modified Bavarian formula, as stipulated by the resolution of the Kultusministerkonferenz (German PDF, 0,1MB). The rubber eyecup can be raised higher with the use of an included extension ring; a twist-up mechanism would have been preferable. The jump from 50 to 70 provides a much larger leap than 70 to 100 to my eyes. Buy all three of our high end 82 degree eyepieces and save! Pros: Low price; good eye relief; solid construction. (1) it seems that for observer favorite FOV is defined by nature of human eye: 120-140 deg. Some models sell for as much as $700 to $1,000 each. The Omegons weight is 600 grams, at the lower end of the range for eyepieces in this group. You currently have javascript disabled. 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. I tested several eyepieces advertised as having 100 fields, all with focal lengths from 13mm to 15mm, a good sweet spot for any eyepiece on most telescopes, and encompassing the focal length of the original 13mm Nagler and Ethos models from Tele Vue. The 4.5mm Morpheus is sharper than the Ethos SX, by a hair. Probably not by much, if at all. Please Log In to view the details for this classified ad. I like having eyepieces at my fingertips. Pop. My conclusion upon testing this 100 group was that performance was more or less commensurate with price. Although I don't believe I've tried any other the eyepieces. 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. It performs well on faster telescopes, a key characteristic of Nagler and Ethos eyepieces. For starters, you can get by with your 9mm (unless you need to wear eyeglasses) and 30mm. The Meade and Omegon represent great values. But its the design and optical ease of a design that makes an eyepiece good for me. The 28mm UWAN does not appear to be available any longer, but here is an old CN article about the line. As good as these 82 eyepieces are, if your budget allows, you might want to consider an even wider 100 eyepiece. A 100 degree field of view provides the user with almost 1.5 times the area of an 82 degree eyepiece. All of these factors add up to create an extremely contrasty eyepiece that is free of unwanted reflections, flaring or ghosting. Top 100 Worldwide. However, stars began to bloat 60 percent out from the center and were quite distorted at the edge. Edited by jrbarnett, 08 October 2014 - 02:40 PM. In short, I found it uncomfortable to use. See William Paolinis review of all six Morpheus eyepieces here, and his full review of the Morpheus 17.5mm eyepiece here. Please note that this tool is only intended to provide a first orientation and the results are in no way binding. You sometimes feel more like you are actually there, in the view. They look as good to my eye as any of the other high-end eyepieces I've used. I think these are the same that WO(?) The eyepieces rival Televue but they were sold to fund an Ethos. 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. So from a practical point of view, I find there's little difference in drift time. What I dislike is decreasing the AFoV when increasing the magnification, the true field takes a double hit. home expressions sheer curtains, morriston hospital swansea address, harbor freight credit account,
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