Why 5 stars? The knurled grip rings and construction of both are superb. The attractive price makes it easier to collect the complete set of three, along with the 8mm and 4mm models. This is a great moderate power wide field eyepiece for viewing all kinds of deep sky objects, the moon and planets. Edited by jrbarnett, 08 October 2014 - 02:40 PM. I have a tendency to increase the apparent field as the magnification goes up so I don't have to push the dob quite as much. Introducing the new Stellarvue Ultra Wide Angle eyepiece series. I find the Televue better, but both the ES and UWA are very close. But I have had really great customer service from stellarvue which is hard to beat, and I have always been happy with their equipment. 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 eliminates the need to rebalance the telescope. Don't dismiss buying a used EP out of the Classifieds section - I found two of mine there. It's the same at low power, which Ernest just pointed out. But the soft eyecup nicely places your eye where it needs to be with no kidney-bean blackout. I find that I can use nearly the entire field of an 82 eyepiece for observing an object but the wider field of a 100 or 110 eyepiece does not add much to the field useful for observing the planets and double stars. To be totally fair, not all eyeglass wearers are the same or require the same amount of eye relief. Edited by Jim7728, 08 October 2014 - 01:32 PM. The Stellarvue Ultrawide eyepiece set includes three eyepieces: 4.0 mm 1.25" Ultrawide angle eyepiece with 82 degree apparent field of view ( click here for specifications) 8.0 mm 1.25" Ultrawide angle eyepiece with 82 degree apparent field of view ( click here for specifications) I didn't understand how big a deal this was until I bit the bullet and purchased a chair. It just felt like a 68-degree field that was pushed slightly further out. I tested it side by side with my 9 mm Nagler on my SV-105 and I could not see any difference. Bottom Line: A well-made eyepiece but costly for the performance. And stars are tack sharp across 95 percent of the field, flaring only slightly at the very edge. The rarity and significance of O-type stars brighter than 6.55 magnitude. Notice how it's sharp in the center and as you get to the edge the stars grow tails? In my 80/480 refractor, I find even 50 degrees for "high" power to be quite good--e.g., Nagler 3-6 zoom. 82 Degree Ultra Wide Angle Eyepieces - Stellarvue Favorite eyepiece field of view - Eyepieces - Cloudy Nights Which points out that the appropriate high power apparent field depends a lot on the focal length of the scope and whether the scope is tracking. But I prefer wider fields when possible - 82 to 100 degrees. Has similar build quality to TeleVue and has a better feel than its APM counterpart. Effect of barlows / field flatness for AT60ED solar imaging. That is a beast and my first 2 eyepiece. eyepiece will limit observer significantly. I have a tendency to increase the apparent field as the magnification goes up so I don't have to push the dob quite as much. Not quite so easy a question. It can just matter on how you want to frame objects personally I feel 60o or less FOV is like looking through a tunnel so I dont use those EP's as much even though I have some. Heres a low-cost zoom eyepiece that actually works well. Edited by betacygni, 05 March 2023 - 10:45 AM. The failure rate, resolution, sharpness, and other subtle differences were there. However, stars began to bloat 60 percent out from the center and were quite distorted at the edge. They look absolutely identical apart from a few superficial features (eyecup, 1.25" barrel and rubber grip band). LMU - Ludwig-Maximilians-Universitt Mnchen, Macromedia University of Applied Sciences, Mediadesign University of Applied Sciences. Certainly a keeper. All important info for international students in Germany (2023/2024), 0 (90 programs for EU citizens/Non-EU), 21,000 per semester (1 program for EU citizens/Non-EU), Program Fees: 0 - 10,000 (per semester), Program Fees: 0 - 9,750 (per semester), Frankfurt School of Finance and Management, Hochschule der Bayerischen Wirtschaft (HDBW), Hochschule Fresenius - University of Applied Sciences. Kunming UWA reskins. Just teasing you, David. Just received the set. Bottom Line: The best for optics but others provide more comfortable viewing. Vixens fine eyepieces dont get the respect they deserve. Omegon in Germany offers many unique products such as their Panorama2 eyepieces. Pros: Very comfortable eye relief; superb optics. And if you like the UWANs, see my review of the WO XWA. Except for the Orion Lanthanum 80, all have 1.25-inch barrels and so can be used on any telescope. Guess I never answered the OP's real question here - favorite FOV, lol. . Going Wide: Nine 82-Degree Eyepieces Compared, A Beginners Guide to Telescope Eyepieces, Price and Quality in a High-Power Zoom: SVBONY 3mm-8mm Zoom Review, Celestron Tabletop Tripod Review: Sometimes Smaller is Better. The latter had good optical performance, but with a twist-up eyecup mechanism that was stiff and greasy in the unit I tested. Munich, Bavaria, Germany Monthly Weather | AccuWeather The OEM can be contracted to make them to whatever specifications, exacting or not, that the "name on the product" requires. Cons: Field less than others; eyecup height not easily adjustable. Well, that was true until the Stellarvue 28mm / 82. You are right, he has a complete optical and CNC machine shop at his facility. Edit: For clarification, I am referring to the apparent field of view of eyepieces, not the true field of view. The new TS UWANs are waterproof and filled with nitrogen. At 564 grams even with its 2-inch adapter tube, Stellarvues Optimus is the lightest of the 100 set, a consideration for balancing smaller telescopes. Note the Meades middle-weight 638 gram mass and that both the Meade and Omegon are just for 2-inch focusers, requiring more costly 2-inch filters. This is the original 100 eyepiece and is still the standard of excellence. Our EOP eyepieces are now loaded into AstronomyTools database and application. 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. Fancy eyepieces are expensive, simpler eyepieces can be nearly as good and much more affordable. The amount of head tilt needed to see the edges of the field are less than other ~100 degree eyepieces, including Ethos, ES, and APM. 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. Does anyone know anything about the new Stellarvue UWA's? Stellarvue Ultra Wide Angle 15mm MSRP $150 Pros: Low price; good eye relief; solid construction. For starters, you can get by with your 9mm (unless you need to wear eyeglasses) and 30mm. The Orion and Vixen 82 eyepieces are also superb in all aspects, though at prices similar to Tele Vue. At NEAF, I purchased the 16mm UWA from Stellarvue for $95. The eyepiece is turned my 115 into a whole new scope for visual observing. At 580 grams, it is the heaviest of the 82 set. I just purchased a SV80A (really excited) and they had deal going where you get the 8mm and 15mm for a little over $100 so I jumped on it. Night Sky Challenges and the Astronomical League. If the grading system of your university uses letter grades, you can assign a number to each letter grade. Stellarvue Ultra Wide Angle Eyepiece Set - EUW-SET Old, from WO. We have the same scope, so I can give you a few pointers to consider. Most suffer from variable plossl, svbony, SVBONY Zoom Eyepiece, Zoom eyepiece. 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. All of these factors add up to create an extremely contrasty eyepiece that is free of unwanted reflections, flaring or ghosting. Fully-multi-coated lenses, rubber grip, 43 mm field lens and 2" filter threads. Program Fees: 0 - 10,000 (per semester) Academic Ranking of World Universities (ARWU) #48, QS World University . EPs: ES 2 . Eye relief is a good 16mm, much longer than the 10mm specified. The 13mm Televue Ethos is $658, the Televue 13mm Nagler is $335. While low cost for a 100 eyepiece, consider import fees if ordering from Europe. As the object, or area of an object, being viewed, often take up a very small area of the field of view. There has always been a good OEM behind WO and SV, but the winner is the consumer, who quite frankly doesn't care because the consumer can't buy directly from the OEM. Anything is possible. Its long 20mm of eye relief, screw-up eyecup and large eye lens makes Orions Lanthanum a pleasure to use. Alan Dyer is an astrophotographer and astronomy author based in Alberta, Canada. It's a great eyepiece. This grade conversion formula, together with your degree programs Academic and Examination Regulations (FPSO), is a tool to help your convert grades earned in countries other than Germany. Despite its modest price and sharp optics, I cant recommend it. I knew they were re-branded. #wo_online_image, #wo_offline_image { Cons: Slightly soft off-axis performance. It performs well on faster telescopes, a key characteristic of Nagler and Ethos eyepieces. Cheers. Bottom Line: Another fine ultra-wide eyepiece for the money. This 9 mm eyepiece is ideal for moderate power work on moons, planets and dark sky objects. The A-T is darn close, but does give more magnification and FOV. The only cons I've noticed is that they are big and heavy and change the balance point for my small scope+cheap mount and like any other optical system they have to cool down to ambient temp to get the best view (which takes a few minutes). Bottom Line: A better bargain 82 eyepiece. 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. Read Alan Dyers comparison of nine 82-degree eyepieces, Tag List TELESCOPE meade eyepiece Explore Scientific tele vue omegon stellarvue. Bottom Line: Near-Ethos image quality for less money. Enter the maximum grade, the minimum passing grade, and your current overall grade in the grading system of your university. All marketing. As objects get smaller, and magnification gets higher, I think I appreciate a view that is tightened up a bit. Haven't noticed these before. This is an enthusiast's forum - these folks typically take good care of their stuff. Thanks for any input if anyone is still watching here. Features --20mm focal length --100 apparent field --15mm eye relief --9 element design --fully multi-coated Academic Ranking of World Universities (ARWU) #48, Academic Ranking of World Universities (ARWU) #52, private (state-approved) University of Applied Sciences, View all 231 courses still open for next intake, Marketing services for German Universities. While still impressive, they arent as wide as the others. Bottom Line: A superb eyepiece for 2-inch focusers. Click here to simulate the field of viewhttps://astronomy.tools/. Are you looking for a List of Universities in Germany for International Students? You would recognize the names of the OEMs if I told you. This is a recommended complete set of eyepieces for use with any Stellarvue telescope from the SV70T to the SV152 Flagship! I've pretty much settled on 68-72 degree eyepieces. Has anyone out there tried both or have any thoughts? You currently have javascript disabled. if(sWOTrackPage)sWOTrackPage(); The one piece of information I have not been able to find here or on other forums is what FOVs people prefer, whether the specified field of view is at specific focal lengths or in general. Anyway, my main concern was trying to get most or all of the Pleiades in my view. Drop it in a barlow or a slow Mak and it's tolerable. Get the monthly weather forecast for Munich, Bavaria, Germany, including daily high/low, historical averages, to help you plan ahead. In the AD8, the APM delivers tack-sharp stars to the edge. Or know anything about the design and/or origins? 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. The eye has to be a little above the eyecup for best position, with eye relief just 12mm. However, on a Schmidt-Cassegrain, with its more forgiving f/10 focal ratio, off-axis sharpness was much better. You probably won't notice the difference. Cons: Very aberrated off-axis star images; slightly less than 82 field. So from a practical point of view, I find there's little difference in drift time. Light Benders: 2" Astro-Physics MaxBright, 2" iStar dielectric, 2" Stellarvue Deluxe, 2" TAL/ NPZ dielectric, 2" Baader Amici prism . This eyepiece is ideal for higher power work on planets and double stars since it is very sharp, contrasty and has a generous 82 degree field of view. Buy all three of our high end 82 degree eyepieces and save! I've had both and they are excellent (and same price)! Anyone tried them? For me, anything 60 degrees or greater feels sufficiently wide. Most suffer from variable plossl, svbony, SVBONY Zoom Eyepiece, Zoom eyepiece. How are the new Orion SkyQuest dobsonians? There's also a comfort factor. With 20mm of eye relief and a large eye lens, this is a very comfortable eyepiece to look through. New guy struggling with eyepiece decisions - Cloudy Nights New from SV? Good decision! Eye relief is a very long 20mm. Might it not be that Stellarvue just have updated the specifications so that they better represents reality? 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. }. The 28mm has a 2" barrel, the rest are 1.25". Now if you had a more expensive 30mm EP, that FOV will remain sharper to the edge. Stars are sharp across all but the outer 10 to 15 percent of the field, so very close to Nagler performance. Of the lower-cost 82 models, this was a good choice overall for both optics and mechanics. Don't have an Astromart account? Stellarvue Ultra Wide Angle EP's - Eyepieces - Cloudy Nights For planets 30-40 deg. I bought this and the 4.7mm on a whim when picking up an SV60. This is the largest and heaviest of the 1.25-inch eyepieces, with a mass of 400 grams. Your scope is a f5.9. LMU - Ludwig-Maximilians-Universitt Mnchen. Please note: Internationally, grading systems used at institutions of higher educations may differ substantially. Never occurred to me that they might actually be the same. This 9 mm eyepiece is ideal for moderate power work on moons, planets and dark sky objects. Eye relief is 15mm, a little longer than the Explore and Stellarvue competitors. 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. Pros: Great optics; wider field; comfortable eye relief and eyecup. Once you look through eyepieces with 82 apparent fields, all lesser eyepieces give the impression of looking down a tunnel. I think probably not. Cool, thanks for the info! Stellarvue 8mm UWA Ultra Wide Angle 82 degree 1.25" Eyepiece - New They were identical to the UWANs (and 5 other brands of the same eyepieces). However, the Omegon and Meade both have apparent fields closer to 90 as I measured it. Nuff said! The 28mm UWAN does not appear to be available any longer, but here is an old CN article about the line. But I can't confirm, and they could be a whole new OEM same as the luminos perhaps, rather than the initial SV82 which I am pretty sure was the UWAN. We are not all the same when it comes to eye relief requirements, especially when choosing an eyepiece that has more elements than the 5 element budget wide field types. I figured out my preferred fov and eye relief by purchasing used eyepieces here on CN. It is been known for a long time that the 7mm UWAN is closer to 8mm, so maybe the previously given field stop specifications have been misrepresented so that the focal length-FOV equation should add up on paper(?). A 20mm eyepiece with a 100 field for only $300 seems too good to be true! Pros: Lightest 100 with good eye relief. A frequent example on here is the 84 degrees of the Docter 12.5, which is a highly accessible but wide field. My conclusion upon testing this 100 group was that performance was more or less commensurate with price. Pros: Very good optical performance and construction; long eye relief. 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. A great one-two punch when observing. MSRP $350. 70 is fine at low power, 78-85 fine at medium power, but I prefer 110 at high power. Though advertised as 82, Celestrons 15mm Luminos had an apparent field between that of the 76 Morpheus and the other 82 models. 8 & 10 Ethos has a bit more light transmission, but this EP is a fraction of the cost , and well worth it! 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. Nice detail of the moon and the cloud bands on Jupiter. Seeing the outer 10 degrees in direct vision is not so easily done. Your grading system is A+, A, B, C, D and E (Fail). In the refractor, though, the 4.5 Morpheus comes into its own, with plenty of drift time with a focal length over 1100mm shorter. I had the 15mm and it lasted 2 weeks in my case. When using hand driven alt-azimuth mounts this generous field will be appreciated. Top-ranked German Universities in Munich. Faster scopes (below f5.9) are more sensitive and require more expensive EP's and a probably a coma corrector. As good as these 82 eyepieces are, if your budget allows, you might want to consider an even wider 100 eyepiece. I have a 4.5mm Morpheus and a 4.7mm Ethos SX. On my f/5 to f/6 test scopes, stars started to distort 50 percent out from the center and were quite bloated at the edge, the poorest optical performance of the group, but one thats commensurate with price. I think they are made by the same company that made other brands, Orion, Zhumell, SmartAstronomy, et al. It looks very similar to the Stellarvue 82. Returned it. Oh, barlowed the 15mm starts to show curvature around the 80-85% mark for my eye and the 4 and the 8mm the same since already barlowed. I once read that Televue actually bench tests all of their eyepieces before delivery to their customers or dealers; if so they may be unique in this regard. Optical performance is also identical and excellent for the money. At least I think they are new because I can't find anything about these focal lengths, they currently have 4, 8, and 15mm available. 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. Be informed, it can't hurt you. If theres one premium eyepiece to buy, it will likely be in this focal length range. Pros: Lowest cost eyepiece in the group; long eye relief. Bottom Line: Very good performance vs. price. You currently have javascript disabled. It is Bavaria's largest city and the third largest city in Germany (after Berlin and Hamburg). At a measured 13mm, eye relief seems a little tight, and 1.5mm less than specified, due to the eye lens being more deeply recessed than in the others. This grade conversion formula, together with your degree program's Academic and Examination Regulations (FPSO), is a tool to help your convert grades earned in countries other than Germany. Those look just like the WO UWANs, and they are in the exact same focal lengths. 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. Anything is possible. Bottom Line: A top-class eyepiece for optics and build quality. Anything more than 82 would have me wasting time rolling my head seeing "what's out there" vs concentrating on what's in the center of the field. No. 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. It sounds like at $65 a piece it would be hard to do any better. Note: For definitions of basic eyepiece characteristics mentioned below, see Ed Tings A Beginners Guide to Telescope Eyepieces. Bottom Line: A good, economical choice for Schmidt-Cassegrains. Below shows the 100 degree Ethos alongside the 82 degree Nagler. The top dust cap fits on only when the eyecup is retracted, an inconvenience. Posted by Steve Lightstone on 8th Aug 2020. I wouldn't expect additional focal lengths. : Pros: Very good optics and waterproof construction. Telescope Eyepieces Guide - High Point Scientific But I don't think I would want all my eyepieces to be 100 degree. Looks like at this time they are all available. The true field of view is 0.75 degrees, with an exit pupil of about 1.9 mm. Yes, for standard 1.25" and 2" eyepiece filters. Heres a low-cost zoom eyepiece that actually works well. For a lighter, lower-cost alternative, and for 1.25-inch focusers, you might wish to consider an 82 eyepiece. ***Apparent Field of View measured in degrees. and even less can be tolerated in condition of tacking mount. He sells a 4.9mm and a 6.1mm, I also have his 2.9mm which seems to have been dropped from the lineup. If so, you will need eyepieces with longer eye relief. The only downside is that it's a bit bulky. I really like the 82 FoV in my scope, great image, easy to manage and store. It is plenty wide enough and 1.25 inch 82 degree eyepieces are just so much more compact than their 100 degree counterparts. 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. Its barrel fits only 2-inch focusers and so requires more costly 2-inch filters. Buy all three of our high end 82 degree eyepieces and save! 51,000 students. Pros: Best eye relief and off-axis star images. Congrats! 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). This counterweight system is used to quickly adjust balance on smaller telescopes when eyepieces of different weights used. But I'm thinking a pair of the 16's might make a nice selection for binoviewers. They are still the best but are expensive. Ive never been a fan of zoom eyepieces. I find I kind of have to make myself use them more often. Add 1/8" if rolled up. All in all, exactly what you'd expect from Stellarvue: A great product at a reasonable price. The eyepieces rival Televue but they were sold to fund an Ethos.I missed the 16mm and regretted it as it's a very useful focal length. Please Log In to view the details for this classified ad. These wider fields allow me to see things with my peripheral vision and make the whole experience that much more comfortable and enjoyable. I'll have to change this in the upcoming 2017 Buyer's Guide. Mega gratz on your new scope NIckwin. The 8-element Morpheus design provides nearly top-class performance for much less than the premium competition, which would also include Tele Vues 72 Delos series. While the rubber eyecup can fold down, it is stiff enough that it is best left up. Buy all three of our high end 82 degree eyepieces and save! $65 a piece is very cheapfor these eyepieces, so you did a very good deal there. Astro-Tech's 20mm XWA: An Affordable Extreme-Field Eyepiece Grade Conversion Formula for Grades Earned Outside Germany - TUM Munich | Germany, History, Population, Oktoberfest, Map, & Facts I had been planning on getting ES 82 degree EP's, but I just couldn't pass these up for the $. A 100 degree field of view provides the user with almost 1.5 times the area of an 82 degree eyepiece. Very fast shipping and packaging. Introducing the Stellarvue Optimus eyepiece series. You sometimes feel more like you are actually there, in the view. Holding your eye in the proper position is way easier. Not saying that's a bad thing, just sort of distracting. Other than that, this eyepiece is excellent and certainly merits your consideration. Reducer Flatteners for other telescopes, Finderscope Eyepieces with Focusing Reticle, Barlows to double the power of your eyepieces, Stellarvue Ultra Wide Angle Eyepiece Set - EUW-SET, Stellarvue Optimus Eyepiece Set with Case - EOP-SET, Stellarvue 4 mm Ultra Wide Angle 1.25" Eyepiece - EUW-04.0, Stellarvue 15 mm Ultra Wide Angle 1.25" Eyepiece - EUW-15.0, Stellarvue 8 mm Ultra Wide Angle 1.25" Eyepiece - EUW-08.0. Stellarvue 8mm UWA 82 degree eyepice that has never been used. I like short UWA's as I only use muscle drive mounts, and I don't have a UWA in 4mm. When using hand driven alt-azimuth mounts this generous field will be appreciated. Nice wide field. For Messier 24 ("Delle Caustiche") even in short focal scope 100 deg. You will get more use out of middle and low magnification EP's now. TS have kept the old 4/7/16mm focal length specifications. of Students: approx. The most eyepieces I use are 65 to 70 degrees. i think that what you are going to hear is : "what are you interested in looking at ?" There are many really good ones available in this category, all across the price spectrum. We all have different preferences for eyepieces. We recommend this as the ideal deep sky eyepiece for viewing nebulae, clusters and galaxies. ), Call us at: 530 823 7796 Open Mon-Fri 9-5 Pacific Time, Read the review of the Stellarvue Optimus eyepieces by Tony Hallas in the May 2017 issue of Astronomy, Our EOP eyepieces are now loaded into AstronomyTools database and application. I do not wear glasses while observing and a 70-degree field of view is very comfortable. 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. That makes swapping eyepieces at high magnifications easier. The rubber eyecup can be raised higher with the use of an included extension ring; a twist-up mechanism would have been preferable. It's hard to keep track of them all. Today, they report 4mm, 8mm, and 15mm and are $50 apiece less expensive, at $149 each. 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. This is why some wide field EP's cost more, some, a lot more. Here is a good listing of who actually makes applianceshttp://www.appliancehase/make.shtml. 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 ES is solidly made and comfortable to use despite its short 11mm eye relief (measured from the top of the eyecup), due to the recessed eye lens (the specs state 15.6mm). I had the pleasure of looking through all of the Optimus eyepieces with Vic at the DSSP. Make no mistake, these are large and heavy eyepieces, with some requiring 2-inch focusers. As Jon said, it will take some time to build an eyepiece range. Accessories, Astrophotography gear, Reviews. The 28mm has a 2" barrel, the rest are 1.25". Eyepieces with 100 apparent fields of view provide the widest actual fields possible at any given focal length (with the exception of the few 110 and 120 models on offer).
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