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The only difference is that they have a different design as well as a shape with their lenses, which affects the magnification of your telescope view. I had a TV 20mm Plossl once. A Barlow lens will not reduce the CA in a low FR achromat refractor so to speak of it changing the focal ratio would, I think, introduce confusion in most situations. 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! SVBONY Direct . The Orthoscopic Plossl eyepiece is for those who are interested in performing close-up work on specimens up to three inches away from them and still get high magnification. Oh the pain of uh having access to really cool eyepieces.). Below 20 however, the eye relief makes it difficult for me and my glasses so Ive been replacing my 5-15 EPs with 82 degree EPs with more relief. The "sharpness" you are seeing may well be better explained by the focal length of the ep than the quality of Plossls in general. If you wish to find a short-focal length eyepiece with a longer, more comfortable eye relief, you could use a long-focus eyepiece with a separate, high-quality barlow lens (an achromatic or apochromatic fully multi-coated barlow would be necessary), or you could purchase one of the several designs incorporating a smyth/barlow lens into the eyepiece design. Higher values are slower and lower values are fasterthis is a holdover from camera lens terminology and has to do with exposure times.). The BHZ in a 2X Barlow will take an XT8 to 300X. A couple of them felt fancier, but the jump in performance was either insignificant or non-existent. Again, this is more noticeable in lower focal ratio scopes. This is perfect for a 25mm Plossl (an extremely common standard) and downright luxurious with a 32mm Plossl, but when you get below about 12.5mm or 10mm, it can begin to get difficult to use. In my opinion, you do not. It doesnt matter what type of telescope you have, as long as your scope takes these standard sizes. 130 mm scope will have a max of 260X for planning purposes. This was very useful, I got a meade infinity 90mm ( after read the review here -. The quality of a Plossl eyepiece completely depends on the brand and model, so be very careful in our selection. 3. These eyepieces have about 35 to 50 degrees apparent fields of view and reasonable eye relief, though quite short for high magnifications. Because of this setup, you might also hear a Plossl eyepiece referred to as a symmetrical eyepiece. They have a 60deg apparent field, long eye relief, adjustable eye shield and extremely well corrected. Combining a cheap eyepiece with a cheap barlow isn't a elegant solution. Since there are so many different types of eyepieces available on the market, choosing the right one for your situation can prove to be a harrowing task. If you want to buy him $200 eyepieces so he can grow into them, that works. Other brands have joined and have used the Super Plossl label, but they all keep the original 4-piece design. Eyepieces are a religion. They are just OK, but I dont recommend them, especially in a low focal ratio scope. Both solutions offer somewhat similar mag-fov-er-price. Tip Its almost always cheaper to buy directly from Agena Astro. The biggest advantage is much better ER in a large ocular. In your case, I would do this for the 30 and the 20. However, I have eyepieces with much smaller exit pupils and they work fine. If you read the article you know how to calculate the magnification and field of view. All of the Omni eyepieces have a 1.25" barrel size with the exception of the super low power 56 mm, which has a barrel size of 2". Also, as the apparent field of view gets wider, the image will require more correction. In most cases, these are eyepieces that are focused on wider AFOV or better correction for low focal ratio scopes. philhas Members 61 459 Location: North East England When you add eyepieces to your collection, you will want to consider what field of view you want and how much you are willing to pay for it. Plossl eyepieces are often included in better telescope packages as the starter eyepieces. I want to help you select the best eyepieces for your budget and your telescope. Today, most beginner telescopes of any quality are sold with either Kellner or Plossl eyepieces. Im fairly picky so would extend budget for better eyepieces if its worth it. Disclosure: This post contains affiliate links and I may earn a small commission (at no extra cost to you) if you click through and make a purchase. We will now discuss the specifications of eye relief and apparent field of view. Some people have more than 6 and some have as few as 3. For modern eyepieces, the differences between Plossl and Super Plossl is going to depend on the manufacturer. This type of eyepiece provides you with wide-field views without any distortion due to its use as an achromatic lens system which reduces chromatic aberrations by combining two lenses made from different types of glass materials together on each surface. Plossl eyepieces have 4 lenses that are paired in two doublets. In comparison, Aspherical lenses generally have no color distortion but might not work out well if the telescope user needs really high magnification. There is the 56mm Meade Plossl which magically turns my short FL refractors into their own finder scopes. If you were considering a Meade Super Plossl, in that case just get the regular one also by Meade. I like my 38/70. Your email address will not be published. - 32mm plossl. The atmosphere is typically the limiting factor as we get to higher magnifications. I also just bought the Celestron Starsense 102mm refractor (650mm focal length, f/6.5) as a first scope for me and my kids. If you had to choose 1 low-power 2 EP for chasing deep sky objects (again, at 600mm f7.5), what size piece would you go for? Warranty Limited Warranty against defects in materials or workmanship for one year from date of purchase. 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. But some people demand the very best, and it is available, at a price. Scott. Can you give me any specific recommendations on what to buy and from where? Personally I think they're still worth it. If you are upgrading, avoid ones that say correct image as these add a prism system into the diagonal which can reduce the light transmission. I beleive this is the same as they ones you asked about. An exit pupil larger than 6 mm may start to show a shadow of the secondary mirror. So plan this into such a purchase. See if you will observe with or without your glasses. 6mm Kellner eyepiece that I enjoyed a lot. Is there anyway you could include links to the eyepieces you mentioned in the last paragraph of your reply as Im totally new so worried about buying the wrong thing! Then there is the rule of thumb to avoid duplicating focal lengths when acquiring eyepieces. For the $66/$42 of these kits, you can get one or two decent eyepieces (depending on where you buy). So, basically a Plossl eyepiece is a type of eyepiece that enables the viewer to see a wider field of view than would normally be the case, but at the cost of him/her having to physically put his eye very close to the lens of the eyepiece. They can also be found as Orion Expanse sporting a blue line rather than gold. PayPal, cash, bank transfer are all acceptable. Explore Scientific recently extended this offering by adding a series of 82 degree eyepieces labeled LER, or Long Eye Relief. Hello sir, thanks for your article its realy helpful. Put the zoom on the Barlow for the high range. Excellent article, thank you very much for taking the time to publish it. So, I am going to organize the guide around five questions and four formulas. Plossl eyepieces are perfect for astronomical viewing because the field of view is wider. My friend has one and he really likes it, and it is his third telescope. the reality is that today's eyepieces are all quite good, particulalarly in an f/10 telescope. If well made, Plossls are bright, with good contrast, and a flat field, and excellent sharpness. These companies rebranded them under their own names. The components of a Plossl eyepiece are the two groups of lenses. This is a good thing, because normally the shorter the focal length of the eyepiece, the less eye relief you have. The view being presented to your eye in a low power eyepiece minimizes everything from optical aberrations in the telescope, to distortions from thermals or atmospheric conditions. While eyepieces with relatively complex, proprietary, or bespoke designs are becoming more commonly available in the beginner price bracket, there is often good reason to choose a much simpler design. Their 50 to 52 degree AFOV is wide enough for general observing. There is no guarantee that you will be able to get a good image of any given target at that level of magnification on any given night. Buy Astromania 1.25" 4mm Plossl Telescope Eyepiece - 4-Element Plossl Design . If that surface is wobbly the scope will be almost useless. I believe the 5000 UWA's are good as well. thanks Ed. If you are on a strict budget, this is a good choice as a zoom eyepiece. A common problem are eyepiece kits, which are big boxes that some telescope suppliers will sell you with half a dozen eyepieces, most of which include annoyingly short focal length Plossl eyepieces. Thanks for your comment. Plossl eyepieces have a wide FOV and are known for their clarity and sharpness. The field of view of the eyepiece has a few effects when it comes to actually using it in the telescope. I really like the simplicity and compactness of these simpler designs (ie: Plssls, Orthos, Kellners, etc). Can You See The ISS With A Telescope? Plossl eyepieces have an eye relief equal to about 80% of their focal length. Between Kellners and Plossls, this means a 32mm Plossl, which maximizes the field of view in the 1.25 barrel diameter format, will show more stars than either a 32mm Kellner with the same magnification but a smaller true field of view, or a 40mm Kellner (or 40mm 1.25 Plossl, which has a 40 degree apparent field of view) with a lower magnification and the same true field of view. But for AP you should really start your planning with the mount. Comparing Orion Telescope & Binoculars options, it appears that a Kellner can be found for almost half the price of a Plossl of the same focal length, although there are also equally cheap Plossls available from various sellers on Amazon that are highly comparable. I think Id really enjoy a zoom for all the reasons you mention, But Im having a difficult time assessing how much weight to put on the field of view of given eyepieces. When I was getting my start in the hobby, I bought an ultra-cheap ($15?) short answer: yes. They are also good for those who have astigmatism because they are designed to be more forgiving with eye placement. And I am a visually observing focused person. Edge sharpness is just satisfactory, nothing to boast about, as is the apparent field of view. Then you can judge for yourself if it is worth it. For it's cost, a 32mm Plssl eyepiece is hard to beat. The Plossl has good color correction plus is free of the ghost images that plague the Kellner. i still use the binos. Be sure to read the following as you consider your eyepiece purchases. 30 = 60 = 1.3 Just search on Astronomy Club and you will probably find one in your area. So I sincerely hope that this article helps you understand the similarities and differences between Plossl and Kellner eyepieces so that you can an informed decision and choose the best one for yourself. The result in magnification is the same and the eye relief associated with the eyepiece is retained or, in some cases, actually lengthened a bit. I consider the Plossl to be the minimum standard for a good eyepiece. It is all about your budget, your goals, and your objectives, as outlined in the article. This eyepiece was even better at correcting false color fringing, but because of internal reflections, the glare was even worse. Many brands of eyepieces are available, including SVBony UltraWide, Astromania UltraWide Angle, Agena Astro StarGuider Enhanced UltraWide Angle and others. In some cases, the eyepieces are waterproof to protect them from internal contamination caused by heavy dew conditions. Perhaps another review would be helpful. They deliver sharp images in almost all telescopes. 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. Plossl eyepieces are great. Free shipping for many products! Eyepieces under $100 each are generally considered budget or low-cost eyepieces. I have not had an opportunity to test it yet but the general discussions have favorable. Omni 56mm Eyepiece - 2" Learn More. 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. FOR SALE! Here we have very good eyepieces with some extra features. . I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. Offering a wide 43 apparent field of view, this 40mm Orion Sirius Plossl Telescope Eyepiece provides extremely sharp images of impressively high contrast. I have used these in my F6 and F5 Dobs and find them a good value for the price. This is where the second formula comes into play. Hi Ed, We often end up spending more on eyepieces than we did on the telescope. These Astromania Plossl eyepieces provide a good way to do exactly that without breaking the bank, and this is what I love about them: they're an affordable way to significantly upgrade your telescopes. Thanks in advance I really appreciate it! I am not aware of an ES branded 70 degree series in the USA, but they do have a Bresser branded 70-degree series. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. I agree with your comment on zooms for kids. Well, I'll just say it. I would wait till you get the scope and use the included eyepieces. Orion SkyQuest XT8 Intelliscope Review Plossls are extremely versatile and can be used for all use cases. At this point, a Plossl and a Kellner are so close in price and performance that you may as well get the Plossl. I have just one Meade product currently and that is a series 4000 1.25 inch UHC type filter which I use for outreach. No surprise there. Then set your maximum based on your aperture and split it up. Ever since, I have been attempting to cram in every fact about the Universe, I can find into my head. Again, for no other reason than to compare it to the 17mm Hyperion and draw your own conclusions about Plssls. You can do that by using this long focal length eyepiece. In essence the design differences between Kellner and Plossl comes down to the number of lenses within the eyepiece barrel. When I had a 6mm Kellner, I found the eye relief annoyingly short, sure, but when compared to the 6mm Plossl that often comes with eyepiece kits, it was luxurious. Its made up of four lenses in two groups. Despite the narrow field of view and short eye relief, it showed shockingly good views of Saturn, Jupiter, and even the Moon. There are many more designs that are associated with specific brands, but the ones above are designs that are produced by many companies in one form or another. 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. They are not that expensive I would pay about $100 for both eye pieces. Kellner eyepieces have 3 lenses cemented together and have a 35-50 degree field of view. You really understood the material. There is always more to learn but it helps if you go in with a good base understanding, and that was my goal. You have to decide how fussy you are about the edges and what your budget can tolerate. 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 20mm Plssl is probably worth it, if for no other reason than to compare the views it gives to the 21mm Hyperion you have. Now here is something that some of us classic scope nuts know - there are plossls, and there are plossls. It was named after Peter Barlow who invented it in the 1800s, so it is usually capitalized. As I mentioned earlier in the article, not all Plossls are created equal, which simply means that there are good Plossls and then there are bad Plossls. So you would have to test the set to see the actual result. Orion Sirius Plossl 10mm telescope eyepiece 1.25" in very good to excellent 185794462395 2. There are so many others at comparable or higher prices, many of which are quite good and some rather poor. So speaking of the Barlow as if it modifies the FL of the eyepiece, while technically not correct, does provide an easier model to understand the net effect. Such eyepieces are able to offer great performance, i.e., satisfactory degrees of deviations, to about a 50.degree field. With the XT8i I usually used the zoom configured with a 1.5X Barlow giving me a 75X to 225X which I found to be nearly perfect for that scope. . These are two very important considerations when you are looking for eyepieces. I was just wondering if plossls are still worth it or should get a better eyepiece in a 30mm range. If you want a very good eyepiece with a bit wider field of view but are on a budget, these are very good choices. There is no shortage of accessories for the Nexstar series. Even though there are more sophisticated types of EPs, Plossls hit the right spot between high-quality optics and price. As I discussed earlier, the zoom lets you explore your target over a wide range of magnifications without having to change eyepieces. This means you will be able to see a greater expanse for the objects in space but with fewer magnification levels than Kellner or Plossl lenses. Also, note that the pricing is based on 1.25 eyepieces. However, sometimes i am at the end of the range of the binocular focus adjustment. You can use the same eyepiece on planets and deep-sky objects (DSOs). They are also really sharp. However, Orion has managed to make one that is quite compatible with most styles of telescope. For shorter focal lengths, the StarGuider BST series eyepieces have greater eye-relief, so are better suited. But what are the differences between these two and how do you know which one to choose? My Barlow is a 2X with a removeable Barlow element that can be screwed right onto an eyepiece giving a 1.5X effect. . The Hyperions work well in SCTs and you can't beat that large eyelens and eye relief ,JMO. 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. 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! These sport a 60-degree apparent field of view, about a 20% wider apparent field of view than Plossl eyepieces. 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. 2x Barlow You could say Super Plossls are not much more than a marketing tactic these days. One of the TMB Planetary eyepieces are extremely nice for 50. I continue to be very pleased with the ES82 eyepieces. dnrmilspec is right. 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. However, some eyepieces have an eye relief as short as 5 mm. It appears to be a custom-made 90 degree binocular built from two 90 degree diagonals and binocular-size objectives attached in place of the usual OTA. This SVBONY eyepiece review should get you up to speed with the budget stargazing options. Differences and Similarities. . Celestron 2026 Erecting Prism Barlow Lens Set is another great choice for those looking to get a variety of magnifications. Ive added comments on where you may find and use them. 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. I have a 4 element (traditional) and a 5 element 32mm Meade, both from the same era in Japan, and the 5 element is much better by quite a bit. Most telescopes come with one or two eyepieces, which gives you one or two magnification options. (Svbonys Plossls, for example, are optically identical to Orions Sirius Plossls). The Plossl eyepiece has 4 lenses, consisting of 2 identical double lenses. They provide a range of magnifications with one eyepiece. The original design for Plossl eyepieces has existed since 1860. Note that the price categories are approximate, as prices can vary between retailers. In stargazing, eyepieces are as important as telescopes are. The image will be reversed left to right so you will need to get used to that. These are considered to be the least expensive eyepieces for serious astronomy and are offered in focal lengths from about 6mm to 40mm. Modified vs Unmodified DSLR Astrophotography: The Ultimate Showdown! But, if you have a plan, you can fill in those slots, working toward a well-balanced set of magnifications. The difference in TFOV will be significant at this focal length. This design features 4 lenses that are paired in two close-set doublets for the eye lens and the field lens. A 32mm Plssl is worth it. I would like to know what is best for a 7 year old that would be getting his first telescope. That is up to you and your budget. Which is Stronger? Eyepiece Field of View Simulator astronomy.tools Field of View Simulator Change Telescope Reset Change Target Add Equipment What follows are specific eyepieces that I have tried, own, or have read so many good reports about that I feel very comfortable recommending them. They are referring to how much or how little distortion is visible as you look from the center of the image out toward the edge. Many thanks, Sophie. Omni 6mm Eyepiece - 1.25" Learn More. Correct image diagonals are easier for beginners and they are great for using the scope during the day, but experience people dont use them for astronomy. In order to help you narrow down your choices, weve created a short guide that can help you figure out what the best viable option is. When a beginner is choosing eyepieces on a budget, there are a number of possible designs they may choose between. For example, if you put a 30 mm eyepiece in a 3X Barlow, it will triple the magnification you get from that eyepiece. Hi Ed, If you do choose to go with a Plossl eyepiece, I highly recommend spending some extra cash to get yourself a decent good quality branded Plossl eyepiece rather than going for a cheap, generic eyepiece which is a Plossl only for the namesake. Now looking for a couple of decent eyepieces. I dont dabble in AP. Any exit pupil between 7 mm and .5 mm is just fine. A wide range of focal lengths are available, all in 1.25-inch size. 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. A key thing to remember is that eyepieces are universal. Offered in both 2 and 1.25, these are excellent eyepieces. As a result, this can cause aberrations in the image as you move from the center of the view toward the edges. Heres the short answer Plossl eyepieces are generally better than Kellner eyepieces, but they also tend to be more expensive. Sooooo helpful! It was grueling, because I couldnt even get the entire field of viewI had to keep my eye hovering above the exit pupil. So, I think it worth your while to try the Plssls. They all work, but as you go up in price, you gain features or performance or both. But your point is well taken. I think you will change your mind. I decided to jump in with both feet and get an Orion ED80 (600mm f7.5 with a 2 focuser, So that I can move into astrophotography down the road. I dont think so. Some reviews also suggest replacing the diagonal. I am considering buying another eyepiece, maybe 6mm, and a Barlow, maybe 2x, to give me a wider and higher range of magnification. there are of course options to plossls which are about the same prices as GSOs such as the BST Discoveries and TMB type eyepieces (new from Skies the Limit on Ebay) which have a wider field and better eye relief than plossls and are probably as good as most things non-premium. Excellent, thank you for the breakdown, very much appreciated. Ive read reviews about my scope. In the case of the Celestron, you get all the focal lengths from 24 to 8mm in one eyepiece that costs $100. This was my first zoom eyepiece and the one that caused me to fall in love with zoom. 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. That said, I should also tell you that not all Plossls are created equal. Orion Sirius Plossl 1.25" eyepieces are ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Stargazing Help came into existence when some young minds got mesmerized by outer space while camping.
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