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The image will be reversed left to right so you will need to get used to that. The field of view of a p Plossl eyepiece is typically 60 to 120 degrees. It is pretty much worth it for everyone that has a telescope with a 1.25 inch focuser to have a 32mm Plssl. Once we are done, they will make sense. that I could slide into my telescope and look at. OK that makes sense, many thanks. You really understood the material. I have four telescopes, but I use the same eyepieces in all of them. Plossl eyepiece is one of the reasonable options when it comes to telescope eyepieces for stargazing or astronomy. Look at the apparent field of view specs and understand what this means for the field of view. For super Plossl eyepiece, the field of view is typically 40 to 60 degrees. Know what diameter eyepieces your scope takes. The 5-lens-element pseudo-Masuyamas that telesonic mentioned are/were fine eyepieces. You mentioned regarding ORTHO eyepieces: Excellent specialty eyepieces, usually for planets. This is important to keep in mind because it means brands have to try really hard to one-up each other because the competition in a niche hobby such as astronomy can be fierce. However, some eyepieces have an eye relief as short as 5 mm. I am not aware of any such solutions for Newtonian reflectors. 1.25" 6.3mm 32mm 40mm Plossl eyepiece set give you a good variation in magnification for a wide range of targets with extra sharpness and long eye relief. A Barlow lens is an optical device that goes between the eyepiece and the focuser. If you read the article you know how to calculate the magnification and field of view. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. This gives us more flexibility at the low end of the magnification range. I foolishly destroyed it while experimenting with solar projection, because I hadnt realized the metal-and-glass construction was aided by a plastic retaining ring on the field stop, and I hadnt realized you do not need to change the eyepiece focal length when doing solar projection. These eyepieces have about 35 to 50 degrees apparent fields of view and reasonable eye relief, though quite short for high magnifications. eyepiece shows signs of use with caps and bolt case, 32 mm Plossl very good cond. I can recommend these with confidence. If you stumble the first few uses, dont be discouraged. For example, if you put a 30 mm eyepiece in a 3X Barlow, it will triple the magnification you get from that eyepiece. As long as you take good care of them, Plossls can last you a lifetime, and you will be able to use them with your next telescope if you upgrade at some point. They are all made by the same OEM manufacturer. In that respect, they are similar to the Explore Scientific 82 degree mentioned earlier. That is up to you and your budget. However, you may see them at higher prices for the short term. Those are significantly more expensive than the 1.25 focal lengths. One of the TMB Planetary eyepieces are extremely nice for 50. I would recommend the Baader Hyperion Zoom for any telescope. These have the advantage that the front section with the optics can be unthreaded and threaded on to the filter threads of a 1.25 inch eyepiece. The only reason it's in this list because of its price and a long focal point. Again, does it create a more immersive viewing experience? Lower power almost always looks better than higher power. Press Esc to cancel. I would recommend the Orion Q70 series over that. no caps come in bolt case. We will use 10 mm as the eyepiece focal length, but we will look at three different 10 mm eyepieces, each with a different apparent field of view, AFOV. This might contain more of what you need. No results, please adjust your filters. I want to help you select the best eyepieces for your budget and your telescope. Now put the zoom on a 3X barlow and you have: Using the zoom approach with a Barlow your eyepiece set would consisit of a 32 mm low power eyepiece. If your scope uses eyepieces that are closer to 1, then you have an old style .965 that is now obsolete. The eye relief is the distance between your eyes and the eyepiece where you are able to view the whole image comfortably. Something in the 30 to 38 mm range with a 65 to 70 degree AFOV. A Kellner eyepiece has 1 double lens and 1 single lens. See if you will observe with or without your glasses. Well, I'll just say it. Again thank you very much for all the information in the page, excellent notes. These sport a 60-degree apparent field of view, about a 20% wider apparent field of view than Plossl eyepieces. . It has made learning the Constellations and star-hopping more fun and engaging for my whole family exactly what I was hoping for. Yes, Plossl eyepieces are some of the most popular with amateurs and professionals alike. They are just OK, but I dont recommend them, especially in a low focal ratio scope. And new proprietary designs come out from time to time. Stargazinghelp.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by linking to Amazon.com. The Wiki article(s) were very good if anyone else is confused. A Plossl eyepiece has a field of view thats very wide, so if youre looking at the full moon or some other object in space with it, chances are youll see the entire thing. That's how cost-efficient the entire package is! Offering a wide 52 apparent field of view, these 10mm, 17mm, and 25mm Orion Sirius Plossl Telescope Eyepieces provide extremely sharp images of impressively high contrast. Even though the design has existed for more than a century, it has stood the test of and is still today the standard against which other eyepiece designs are measured. I wont go into all the types of aberrations that can be there. ORION SIRIUS PLOSSL 10mm telescope eyepiece 1.25" - $17.01. Quality this good usually costs a lot more. Plossl eyepieces have a wider field of view that can go from 50 to 56 degrees. The availability of good quality relatively wide field-of-view inexpensive eyepieces has kind of put them in the second tier of eyepieces, but they still hold their own in the longer focal lengths and excel if one does not demand a wide field-of-view. In the world of eyepieces, when you want the very best, turn to Tele Vue, but be prepared to pay a truly premium price. I have used these in my F6 and F5 Dobs and find them a good value for the price. Heres the short answer Plossl eyepieces are generally better than Kellner eyepieces, but they also tend to be more expensive. If money is not a concern, you cant go wrong with Tele Vue eyepieces, any Tele Vue eyepieces. These low-quality Plossls lack an internally blackened lens barrel with thread baffles and blackened lens edges and sophisticated anti-reflection multi-coatings, all of which are a necessity to produce an excellent image. Plossl eyepieces are great. In this case, I am going to define this by the focuser and eyepiece size. My understanding of eyepieces was very limited until I read this article, you explain things in a clear and understandable way which made my understanding so much clearer. These eyepiecesproduce a 'standard apparent feld of view' of between 50 and 56 with most set at around 52. Free shipping for many products! Some of these series also offer 2 eyepieces for telescopes that can accept 2 eyepieces. This 10 mm Orion Sirius Plossl Eyepiece is a great, moderately high power ocular for observing small planetary nebulas and globular star clusters, as well as for planetary probing when seeing conditions don't permit higher magnifications. The one exception I would keep in mind would be when working with Newtonian reflector telescopes below F5. I dont know if they make anything like this anymore, but as a kid, I had plastic slides with images on them (the Milky Way, Horse Head Nebula, etc.) very happy. I cannot thank you enough! The category is over $300 and some of these are way over $300. I have just one Meade product currently and that is a series 4000 1.25 inch UHC type filter which I use for outreach. A key thing to remember is that eyepieces are universal. Some include: Parks Gold Series, Celestron Ultima's, Meade Series 4000 Super Plssls (depending on year / origin / style) and a few others that I don't remember. If you do not have your Hyperions yet I recommend you wait until you have these and try them out before you buy the Plossls. Focus on the magnifications rather than the mm of the eyepieces. The 50 apparent field of view is plenty for me. For one thing, a wider field of view is almost always more pleasant. Simple Plosels work well and unless you have money burning a hole in your pocket, I would start with simple affordable eyepieces. Why two sizes? You are talking about the technical details of how a Barlow works, and I agree. This is the link to the one I plan to buy as I know some others come with add ons: https://www.rothervalleyoptics.co.uk/baader-hyperion-mark-iv-8-24mm-universal-zoom-eyepiece.html, Thats great you had an XT8i that makes me feel confident I got a good telescope . You can buy a range of these from Modern Astronomy. Another useful aspect of a wider field of view is that, assuming the entire eyepiece is sharp enough to show good images right to the edge, you dont have to nudge the telescope to track the rotation of the Earth as often with a Plossl (50 degrees) compared to a Kellner (40 degrees). Again, for no other reason than to compare it to the 17mm Hyperion and draw your own conclusions about Plssls. They are usable, but your eye will be extremely close to the top lens glass. I guess my curiosity is mostly about the diagonal. Kellners can be as little as half the price of a Plossl in the same focal length, but they are generally very comparable, especially in recent years as telescope prices have fluctuated in response to changing supply chains and demand. The way a Plossl eyepiece works is by using the convex lens and concave lenses to create an image that has both total magnification of what youre viewing, as well as erect images. 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. Even though both eyepieces are very common in beginner telescopes, it has become harder to find Kellner eyepieces on their own in the last two years, whether they come from a brand name or the original equipment manufacturer or a reseller. Good quality. Omni 40mm Eyepiece - 1.25" Learn More. You also get 7 1.25 filters which include the following, #80A Blue Filter, #58 Green Filter, #56 Light Green Filter, #25 Red Filter, #21 . Prices can run from $20 to $200 so the field is pretty broad. Thanks for a very helpful guide. I like my 38/70. Thus the 30 mm eyepiece in a 600 mm telescope produces 600/30 = 20X magnification while with the Barlow, we have 1800/30 = 60X. Even if the scope comes with the more acceptable Kelner or . Cheap to try, and if you don't like it, easy enough to sell also. An exit pupil larger than 6 mm may start to show a shadow of the secondary mirror. The 66-degree AFOV of the Gold Line series provides a 32% wider field than Plossl eyepieces. And I am a visually observing focused person. One learns by observing. Here we have very good eyepieces with some extra features. Meanwhile, Plossl eyepieces are much more common and easy to find. If we want to get VERY specific to a combination then inherent aberrations of this scope and that eyepiece could produce a unique result. The longer FL Plossls (>15mm) have some distinct advantages over more complex designs without the major disadvantage of Plossls which is short ER. Gold line eyepieces are available in 6mm, 9mm, 15mm, and 20mm focal lengths. I havent been into the hobby for long but my experience is in line with whats been said. Dont worry about the math, as its simple stuff you can do with any calculator, on paper, or perhaps in your head. Omni 56mm Eyepiece - 2" Learn More. Also, atmospheric conditions can limit how much magnification you can use on a given night. No surprise there. Kellner and Plossl- both are two different types of eyepieces for telescopes. Hi, I have recently bought a Orion XT8 and am trying to work out which eyepieces to add to what is provided with the scope. Buy Astromania 1.25" 4mm Plossl Telescope Eyepiece - 4-Element Plossl Design . Or, if you are buying from an online like Amazon, then look at the eyepieces I recommend and see if any suit your needs. Although Kellner eyepieces will help you learn a lot in the beginning but soon will realize that youre missing out on something, and eventually you will be tempted to spend money on another good quality eyepiece. As for tabletop scopes, dont forget that you need a table, stool, or bench to place them. To get the best performance, you have to be willing to pay the price. That is a really interesting picture. Magnification or power = focal length telescope / focal length eyepiece, Focal ratio = focal length telescope / aperture telescope, maximum practical aperture = aperture X 2, Edges of the optics are blackened for increased contrast, which prevents internal reflections, Anti-reflection, fully multi-coated optics provide enhanced light transmission for bright and clear images. (Focal ratio is a term that refers to the telescopes focal length divided by its aperture. When you use a Barlow lens with an eyepiece, you get the magnification, but the eye relief is not affected. 20 = 90 = .8 Not only is it good to share the experience but you can get first-hand advice on things like diagonals and may even be able to try one in your scope to see if it makes a difference. This is my all-time favorite eyepiece and the one I use more than all the others put together. In my scopes a simple zoom eyepiece like the Celestron 24-8mm or the Baader has replaced the higher powered plossls. I cant answer that specifically as I have no experience with that eyepiece in that scope. Generally, dont mess around with solar projection unless youre okay with damaging the instrument. The Baader offers wider fov, but at quite the price premium. You can enjoy wide-angle views without giving up any of the clarity or sharpness when using Plossl eyepiece while Kellner will give you more magnified views but at less than half the brightness levels in comparison to other lens designs on this list if light pollution was involved. Thanks, Angelo M. You picked a great first scope. They are a good brand with high-quality eyepieces, you just dont need to spend the extra money for almost no gain in performance. In my opinion, there are no wrong exit pupils. Newer multi-coatings are better, I suppose, but newer does not always mean better in the ocular game. I do not miss beating my eyelashes against a 9.7mm Meade Plossl that I used to own. This will give you a lower power and a medium to high power eyepiece, depending on the focal length of your scope. Plossl eyepieces have 4 lenses that are paired in two doublets. Plossl eyepieces are perfect for astronomical viewing because the field of view is wider. Unless you are a professional astronomer or extremely demanding, you can select your eyepieces based on magnification, the apparent field of view, eye relief, and price. With a refractor, SCT or MCT, it is usually better to get a correct image diagonal than a correcting eyepiece. These eyepieces are technically called Symmetrics, since Plossls can have different focal lengths for each doublet, but they are always marketed as Plossl. Are there any good low-cost 2 EPS out there? https://telescopicwatch.com/best-telescope-eyepieces/. Can you give me any specific recommendations on what to buy and from where? Note to spectacle wearers: Plssl eyepieces with 15mm and longer focal lengths are good choices for spectacle wearers. Understanding and using a Barlow Lens Your email address will not be published. Sorry but I am not offering a configuration and pricing service. I dont own nor have I used it, but Orion has a very good reputation. The Big Bang Optics also participates in affiliate programs with Clickbank and other sites. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Our team of experts has reviewed and ranked 180+ telescopes based on price and quality. This is why many telescopes come standard with at least one Plossl eyepiece. https://www.amazon.com/Explore-Scientific-68%C2%B0-40mm-Eyepiece/dp/B007LMG3F6/ref=sr_1_1?dchild=1&keywords=explore+scientific+68&qid=1606584676&sr=8-1, Thanks for your reply, I think I will go for the Orion Q70 . Im fairly picky so would extend budget for better eyepieces if its worth it. Plossl telescope eyepieces are the most popular type of eyepiece on the market. Oh the pain of uh having access to really cool eyepieces.). A 20mm Plssl is probably worth it, if for no other reason than to compare the views it gives to the 21mm Hyperion you have. Also, as the apparent field of view gets wider, the image will require more correction. In essence the design differences between Kellner and Plossl comes down to the number of lenses within the eyepiece barrel. Let us know in the comments if there is anything else you want to ask or share your thoughts on this post, always looking forward to feedback from others who will benefit from it as well! Every new skill takes time. https://www.widescreen-centre.co.uk/explore-scientific-70-eyepieces.html. In the beginning, you are not going to know what the atmospheric conditions might be in your area. No price limit? Excellent article, thank you very much for taking the time to publish it. did i pass? Despite one being fundamentally superior to the other in terms of image correction, Kellners and Plossls are generally quite comparable in terms of the image you actually see. For what it is worth, a slow scope like your CPC9.25 (f/10?) Are plossl eyepieces still worth it? One of the main drawbacks of this eyepiece, though, is the eye relief. For our experience level, would you recommend changing anything right now?