Eyepieces under $100 each are generally considered budget or low-cost eyepieces. I cannot thank you enough! eyepiece shows signs of use with caps and bolt case, 32 mm Plossl very good cond. To achieve a maximum of 200X (2X the aperture of 100 mm), we solve for the focal length. Plossls tend to come with large, ground-standing Dobsonians, whereas youre more likely to find a Kellner sold with a tabletop Dobsonian. Kellners are often sold with cheaper, even more entry-level telescopes than Plossls. I see that there are some optical limits to how wide an FOV a 1.25 EP can manage at bigger (like 32mm) focal lengths. And, in general terms, the higher the AFOV, the harder it is to make an eyepiece that will present a good image all across the field of view, which also drives up the cost. Over $250, I will label premium eyepieces. Many Kellners are made with field stops opened up to 50 degrees, in which case it can truly compare to a Plossl in any telescope with a focal ratio of f/6 or slower. Every new skill takes time. There are so many others at comparable or higher prices, many of which are quite good and some rather poor. This is why many telescopes come standard with at least one Plossl eyepiece. I once had to use a 6mm Plossl to attempt to perform a star-test collimation for a telescope at the observatory. I have Celestron and the Baader Hyperion. https://telescopicwatch.com/orion-skyquest-xt8-intelliscope-review/. 8.8 = 240 = .34 This four-element Plssl design is the most popular eyepiece optical design that gives you excellent image quality, good eye relief, and a 50 to 56 degrees apparent field of view. The views through it are very impressive, and it always amazes me when I get that one out. How important a consideration is this when deciding on an eyepiece? My most used eyepiece is an 8-24 mm zoom. Choosing the most appropriate can completely change your experience in using telescopes. This doublet design has an apparent field of view of 50-degrees or wider but can suffer from short eye relief making them difficult to use for some . This is your Lexus, Acura, and Infinity types that offer more features, better build, and a bit more polish. Eye relief is the distance from the eye lens to your eyeball, and the higher the better (within reason). Sooooo helpful! Here are a few types of eyepieces you may read about and their typical AFOV. Offered in both 2 and 1.25, these are excellent eyepieces. What I can say is that, in general, eyepiece characteristics are inherent to the eyepiece. As Im sure you know, a Barlow actually narrows the cone of light that enters the eyepiece, hence it affects the apparent focal length and thus the f/ratio of the telescope objective. Yes, the wider field of view of a Plossl is very helpful, but 40 degrees of Kellners isnt a soda straw (unless you are used to looking through very wide field eyepiece. Customer reviews Average Rating (16 Reviews): Write a Review and share your opinions! The longer FL Plossls (>15mm) have some distinct advantages over more complex designs without the major disadvantage of Plossls which is short ER. When I was getting my start in the hobby, I bought an ultra-cheap ($15?) Plossl eyepieces are great. Not perfect to the edge but better than the Bresser, in my opinion. What Is A Barlow Lens For A Telescope? If youre still wondering between a Kellner vs Plossl, my advice to you would be invest a little extra cash and go for a good quality Plossl. 3. The combination of high-quality optics and accessible prices have made them the favorite design for amateur astronomers and even professionals. 2x Barlow They also improve a bit when it comes to eye relief. Plossls are extremely versatile and can be used for all use cases. The downside to this type of lens is that they can cause chromatic aberration which creates colored spots around bright objects such as planets or stars due to the different wavelengths not going through equally. Celestron 2026 Erecting Prism Barlow Lens Set is well suited as an astronomical viewing lens kit or for enjoying terrestrial sights like nature walks, sporting events, and more! It comes with two Barlow lenses, one Newtonian eyepiece, and three Plossl eyepieces in the set. Read the full Earning Disclosure here. Again thank you very much for all the information in the page, excellent notes. The components of a Plossl eyepiece are the two groups of lenses. As we continue, what would you recommend adding first? One last thing, as a kid I used my telescope to watch squirrels and birds (which was interesting because the image was flipped around :-) so, you might consider getting an eyepiece that flips things the right way around so that navigating terrestrial nature is easier to manage. Lets illustrate with an example using a 1200 mm FL telescope. Well-made lenses are expensive though, so in general the more lenses, the higher the price of the eyepiece. None of my fancy EPs have enough contrast for this application. Now we just divide it up and fill in some sample focal lengths. By correcting for aberrations, the field of view of these eyepieces could be much larger than the soda-straw field of view in a Ramsden or Huygens, around 40 or perhaps up to 50 degrees. Note that the Explore Scientific 68 and 82 degree eyepieces are also available in 2 size for your low power wide view requirements. There are three types of Plossl eyepiece: the regular, Super, and Orthoscopic. I would recommend the Orion Q70 series over that. For modern eyepieces, the differences between Plossl and Super Plossl is going to depend on the manufacturer. No, adapters are not needed but they may come in handy when you want to change the focal length or add other lenses such as filters or Barlow lenses. As is outstanding in the workmanship, a Plossl type eyepiece is a moderately wide field eyepiece involving two colorless doublets in which the crown components generally face each other. Be sure to read the following as you consider your eyepiece purchases. As new anti-reflection coatings were developed, it became possible to actually make use of complex lens arrangements (not just in relatively simple 4-element systems but also in convoluted, extreme wide-field eyepieces such as the TeleVue Nagler). 30 = 60 = 1.3 Even if you did need a 4mm focal length (for high powers in an f/4 telescope, of course), neither a Kellner nor a Plossl would have long enough eye relief for that to be comfortably usable! For what it's worth: I believe the Omni 1.25 inch 2x Barlow is one of the Shorty Barlows manufactured by GSO. So, even if you have a Maksutov-Cassegrain scope, you should get a good experience from this eyepiece. There is the 56mm Meade Plossl which magically turns my short FL refractors into their own finder scopes. Age is not part of the equation. You can email me also. Finally, the worldwide pandemic has led to shortages and price jumps on many items. You are asking about a very specific eyepiece in a very specific scope combined sometimes with a Barlow. Thanks, Angelo M. You picked a great first scope. In that respect, they are similar to the Explore Scientific 82 degree mentioned earlier. Oh the pain of uh having access to really cool eyepieces.). I think some of these kits even include 4mm eyepieces, and thats ridiculous! As to a more immersive experience, yes, I would say a wider FOV does provide a more immersive experience. Then set your maximum based on your aperture and split it up. thanks for all your help. The Big Bang Optics participates in the Amazon Services LLC Associates Program, which is an affiliate advertising program designed to provide a means for websites to earn advertising fees by advertising and linking to amazon.com. Thanks in advance I really appreciate it! Poorly chosen eyepiece might give you poor experience and sometimes even make stargazing difficult. If you don't like the reflections, there really aren't many other budget options at its focal length beside a Plossl which will be super uncomfortable to use, or spending over $100 for something like a Meade UWA. That said, I should also tell you that not all Plossls are created equal. I purchased the Celestron Starsense 102mm refractor, focal length 660mm, stated highest useful magnification is 240x; it should arrive in about 2 weeks. These are two very important considerations when you are looking for eyepieces. Buy Astromania 1.25" 4mm Plossl Telescope Eyepiece - 4-Element Plossl Design . In comparison, Aspherical lenses generally have no color distortion but might not work out well if the telescope user needs really high magnification. They also offer more eye relief than Plossls at the shorter focal lengths. You can read a thorough review of Goldline eyepieces here. Then there is a pair of 32mm and 20mm TV Plossls which make my binoviewers work well with a Daystar Quark H-alpha solar filter. If you look up transparency and seeing in the context of telescopes you can learn more about how atmospheric conditions will affect what magnifications you will choose on any given night. The magnification and field of view is the same as a 10 mm eyepiece (AFoV being unchanged) in a 600 mm telescope but the eye relief is that of a 30 mm eyepiece. In 1860, Georg Simon Plossl invented the Plossl eyepiece. The only one not in the article is the Orion Q70 which is available in 38 mm, 32 mm and 26 mm. I have to say that your questions are answered in the article. If you have a longer focal length telescope, your shortest focal length eyepiece will be a higher number than what I have shown here. These are the workhorse eyepieces of today. https://www.amazon.com/Orion-8829-Wide-Field-Telescope-Eyepiece/dp/B000M89H7C/ref=sr_1_2?dchild=1&keywords=Orion+Q70&qid=1606584502&sr=8-2, The Explore Scientific 68 degree series would be better but at a much higher price. They have good center sharpness but exhibit some field curvature and astigmatism. Once we are done, they will make sense. Save my name, email, and website in this browser for the next time I comment. Nice, thank you again for the additional inputs. They deliver sharp images in almost all telescopes. It also gives the widest possible exit pupil in my dob and SCT, very handy when using nebula filters. Some optics brands have taken the next step and launched some eyepieces they have labeled as Super Plossl. Today, most beginner telescopes of any quality are sold with either Kellner or Plossl eyepieces. Tele Vue has eyepieces that approach $1000. But the longer FL units are certainly useful. You alluded to them, but you never mentioned Tele Vue. Lets just say that once you get below F5, it is really hard for the eyepiece to deliver a clean image to the edge. For what it is worth, a slow scope like your CPC9.25 (f/10?) (often referred to as Pseudo Masuyama). And that is pretty much what Super Plossl are today. So save yourself this future unnecessary expense and just buy a Plossl. Can you help me. Aspheric and Plossl Plossl are both lens designs that can be used in most telescopes. In the early days of telescopic astronomy, refractor telescopes were designed with a single lens at the front and a single lens at the back. That is up to you and your budget. In my opinion, there are no wrong exit pupils. Kellner vs Plossl - Comparison table. Thanks. Apparent Field of View: This is a measure of how wide a view the eyepiece will provide as compared to alternate eyepieces. Plossl eyepiece is one of the reasonable options when it comes to telescope eyepieces for stargazing or astronomy. Plossls provide very good eye relief for eyeglass wearers in focal lengths of about 25mm and longer. But the conventional way of expressing it is in terms of eyepiece focal lengths. My Barlow is a 2X with a removeable Barlow element that can be screwed right onto an eyepiece giving a 1.5X effect. Besides fov, How would you compare the optical quality of the Celestron to the Baader? Stargazinghelp.com is a knowledge hub for professional and amateur astronomy and astrophotography enthusiasts. With a refractor, SCT or MCT, it is usually better to get a correct image diagonal than a correcting eyepiece. SVBONY Telescope Eyepiece Set Telescope Accessory Kit with 2x Barlow Lens 4 Element Plossl Design 6.3mm 32mm 40mm for Astronomical Telescopes. The Astrovid 40X60mm Zoom Telescope Camera Lens Kit is a great choice for those looking to get a variety of lenses, at different magnifications. I have seen some gatekeeping in this hobby about Kellners, and Im not sure I understand it. 4. The Big Bang Optics also participates in affiliate programs with Clickbank and other sites. Perhaps you should seek out help from your local astronomy club. I cant answer that specifically as I have no experience with that eyepiece in that scope. Well, I'll just say it. I currently own a Mak127 ( that can't use 2"eyepieces) and a 80ED ( that one can hold 2"eyepieces). Can you give me any specific recommendations on what to buy and from where? These are exceptional eyepieces, and only available on the used market nowadays. Simple Plosels work well and unless you have money burning a hole in your pocket, I would start with simple affordable eyepieces. Press Esc to cancel. I recently purchased the SVBony 7-21 zoom from Amazon. You really understood the material. And the zoom provides every magnification in that range without having to change eyepieces. They can be recognized by a thin gold line just below the eye cup.