There is one aspect in which a Kellner can actually outperform a Plossl: eye relief. If you were considering a Super Plossl made by an entry-level brand, just use those extra funds to instead get a regular Plossl made by a more reputable manufacturer. The design uses a planoconvex, two cemented-element eye lens and a large convex field lens. Think of these as your Ford, Chevy, and Toyota of eyepieces. . I dont think so. 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. In the case of the Celestron, you get all the focal lengths from 24 to 8mm in one eyepiece that costs $100. Explore Scientific, like many eyepiece providers, have higher-priced and budget lines. The design of a Plossl eyepiece consists of an objective lens with one side that is convex (wider than its length) while the other side is plano-convex or flat in shape. 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. Offered in both 2 and 1.25, these are excellent eyepieces. This can be debated 100 ways, but that is my advice. Question: would it perform well with 1.5/2x and 3x Barlows? Kellners tend to have narrower apparent fields of view (40 degrees rather than 50 or 52 degrees in a Plossl), and in short focal length telescopes (focal ratio f/5 or shorter) they can have more false color fringing, but for the most part it is hard to notice the difference between a well-made Kellner and a well-made Plossl in terms of image quality. A Kellner eyepiece has 1 double lens and 1 single lens. If you want a very good eyepiece with a bit wider field of view but are on a budget, these are very good choices. For our experience level, would you recommend changing anything right now? But the longer FL units are certainly useful. 32mm (20x & 40x). 70 mm scope will have a max of 140X for planning purposes. What happens if you use an eyepiece that has a the wrong exit pupil? I couldnt find any suggestions on your site about diagonal recommendations. That said, I should also tell you that not all Plossls are created equal. My Meade 4000 56 and 60 degree Meade Plossls are pretty sharp to my eyes and do pretty well for me. I have since moved up to a 12 Dob but I use the same eyepieces and the BH Zoom continues to be my most used. Using this approach, you would buy a 2X Barlow and hold off on the 4 mm and 3 mm to see if you can reach these magnifications often enough to justify buying an eyepiece. However, some lateral color error is apparent when looking at bright subjects, such as Jupiter or Venus, against a dark sky. That is a wonderful expression. These "other" ones I speak of, aren't technically that, they are a 5 element eyepiece, of a different design. 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. The 4000 SWA's were way overpriced for their performance IMHO. Perhaps you have read about planetary eyepieces, DSO eyepieces, and other types of specific eyepieces. I owned an XT8 Intelliscope which is the same optical tube on a PushTo mount. Pentax K-70 Astrophotography: The Ultimate Camera on a Budget! The original design for Plossl eyepieces has existed since 1860. I use some plssl eyepieces, since I still have quite a few in my kit, and yes, the others are correct. the shorter the focal length eyepiece = the shorter the eye relief. In your case, I would do this for the 30 and the 20. Eye Relief: This refers to how close your eye has to be to the lens in order to see the full field of view. If you cant use 2, that 32 mm Plossl, which has a 50 degree AFOV, will give you about as wide a field of view as you can get in a 1.25 eyepiece. We are a team of active amateur astronomers, here to help you with all your astronomy and science related needs this is anything, from reviewing the latest telescopes to be released to talking about gravity and neurons. I have seen elsewhere discussions about the exit pupil of eyepieces. The ES is actually slightly cheaper than the Orion but my understanding from your reviews and replies is that ES might actually be the better eyepiece have I got that right? Optics manufacturers began selling and popularizing Plossl eyepieces, albeit with a generally simplified design where each achromatic doublet had the same focal length. With a refractor, SCT or MCT, it is usually better to get a correct image diagonal than a correcting eyepiece. Super Plossl eyepieces are generally a little smaller than this at around 16-20 mm in size, which is why theyre sometimes referred to as wide-angle or low power plossls. If we want to get VERY specific to a combination then inherent aberrations of this scope and that eyepiece could produce a unique result. Thanks for your comment. They deliver sharp images in almost all telescopes. To get the best performance, you have to be willing to pay the price. It had one of the best fields, edge to edge, in my SCT that I've ever seen. But the difference in price to get to the next level is high, and the performance difference may be small. Poorly chosen eyepiece might give you poor experience and sometimes even make stargazing difficult. To say it a different way, in general, an F5 scope will place more demands on the eyepiece around the edge of the field of view than an F10 scope. For visual use, 1.5X, 2X, 2.5X, and 3X Barlow lenses are common. We are a reader-supported organization. By default, expect a 40-degree field of view in a Kellner and a 50-52 degree field of view in a Plossl. Quality this good usually costs a lot more. I once had to use a 6mm Plossl to attempt to perform a star-test collimation for a telescope at the observatory. Type above and press Enter to search. They are also good for those who have astigmatism because they are designed to be more forgiving with eye placement. An exit pupil larger than 6 mm may start to show a shadow of the secondary mirror. 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. 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. Worth is a subjective evaluation, so here is my subjective input: 1. Ever since, I have been attempting to cram in every fact about the Universe, I can find into my head. You can do the calculation which will show that the 70 will have a significantly wider field of view as compared to the 52. https://www.amazon.com/Orion-8879-1-25-Inch-Enhanced-Telescope/dp/B000BMPBLK/ref=sr_1_8?crid=3KKUJRXYYN7DI&dchild=1&keywords=telescope+diagonal+1.25&qid=1610887695&sprefix=telescope+diagonal%2Caps%2C512&sr=8-8, Excellent article and very good recommendations. I have to say that your questions are answered in the article. But I have one little niggle. The Plossl has good color correction plus is free of the ghost images that plague the Kellner. No price limit? Some people have more than 6 and some have as few as 3. You mentioned regarding ORTHO eyepieces: Excellent specialty eyepieces, usually for planets. So perhaps you do your line up like this. This eye piece provides the maximum true field of view in the 1.25 inch format. In this article, we will only focus on the differences between Plossl and Kellner eyepieces. Plssl eyepieces are affordable and they're outstanding additions to amateur telescopes. 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. Im also uncertain about what to expect from an additional investment? The longer FL Plossls (>15mm) have some distinct advantages over more complex designs without the major disadvantage of Plossls which is short ER. Something in the 30 to 38 mm range with a 65 to 70 degree AFOV. They have a 60deg apparent field, long eye relief, adjustable eye shield and extremely well corrected. You will get varying opinions on this but I would not worry too much about this. I have four telescopes, but I use the same eyepieces in all of them. Again, I only do this for my low power wide views. These are the best in optical performance and build quality. If you want to observe the fine details of a specimen, Plossl eyepiece has a higher magnification than an ocular with lower lenses. Come join the newest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors. Plossls and Kellners, like other simple eyepiece designs, have moderate fields of view and tend to have short eye relief as you scale them down to shorter focal lengths. Thanks so much. Despite this, I also have some Plossls which are indispensable. The Regular Plossl eyepiece is made to be a basic type of scope for viewing objects that are nearbysay within two feet or so from where youre looking through it. It has made learning the Constellations and star-hopping more fun and engaging for my whole family exactly what I was hoping for. People may have heard, and rightly so, that Huygens or Ramsdens are crummy eyepieces and that they should get a Plossl instead, and they may believe the same applies to Kellners, but the truth is that Kellners are often good eyepieces. Offering a wide 43 apparent field of view, this 40mm Orion Sirius Plossl Telescope Eyepiece provides extremely sharp images of impressively high contrast. We often end up spending more on eyepieces than we did on the telescope. Orion Sirius Plossl 1.25" eyepieces are ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains. Omni 56mm Eyepiece - 2" Learn More. They can also be found as Orion Expanse sporting a blue line rather than gold. Then set your maximum based on your aperture and split it up. A Televue Plssl may be better than a generic one, but the difference is probably not worth the additional cost. 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). The difference isnt that severe, and I often track more often than is strictly necessary to keep the object centered anyway. And remember, when all else fails, read the instructions. I had one and sold it. In essence the design differences between Kellner and Plossl comes down to the number of lenses within the eyepiece barrel. This is just a planning target. In general terms, the higher the AFOV number, the more the eyepiece will cost. A super Plossl eyepiece is a top-performing eyepiece that can be used for a variety of tasks, from viewing objects in the distance to looking at microscopic things. A typical zoom eyepiece has a focal length range of 8 mm to 24 mm. . When I was getting my start in the hobby, I bought an ultra-cheap ($15?) So save yourself this future unnecessary expense and just buy a Plossl. Looking from different sorts I found the Baader Aspheric 31mm and 36mm.these two eyepieces allow me to switch between 2" and 1.25"just by changing the barrel. Combining a cheap eyepiece with a cheap barlow isn't a elegant solution. The Wiki article(s) were very good if anyone else is confused. I do not miss beating my eyelashes against a 9.7mm Meade Plossl that I used to own. While I also have the Baader Hyperion Zoom, mentioned later, I continue to make use of the Celestron, especially in my smaller scopes. I cannot thank you enough! To achieve six magnifications, you can have six eyepieces. I must also warn you that some of these bad Plossls may actually turn out to be worse than any run-of-the-mill Kellner. I often had to drop back to about 180X because of poor seeing and transparency. My Baader Hyperion Zoom is my most used and favorite eyepiece. If you are investing for the future, get the BH zoom. However, Orion has managed to make one that is quite compatible with most styles of telescope. Wide view and well-corrected view, even in F5 scopes. You will see these under many brands, including Orion, Celestron, GSO, and others. For planetary viewing, comfort is essential in helping to increase viewing time . Now here is something that some of us classic scope nuts know - there are plossls, and there are plossls. 1:10 . I would recommend the Baader Hyperion Zoom for any telescope. There is no shortage of accessories for the Nexstar series. Simple Plosels work well and unless you have money burning a hole in your pocket, I would start with simple affordable eyepieces. The atmosphere is typically the limiting factor as we get to higher magnifications. Now looking for a couple of decent eyepieces. My love affair with space began in a field in India at the age of 7, when I looked up at the Milky Way for the first time. Would a higher magnification eyepiece help do you think or am I already pushing my telescope (XT8) to highest sensible magnification I can with BH zoom on setting 8mm and 2x Barlow? Since it's such a popular eyepiece and allows for quality, planet-viewing, that makes it a great instrument for attracting newcomers to the hobby, especially children. In retrospect, I should have included Tele Vue. Im just starting out with astronomy and this really helped my understanding. Most telescopes come with one or two eyepieces. It comes with two Barlow lenses, one Newtonian eyepiece, and three Plossl eyepieces in the set. It may be a bit less than that in reality but for practical purposes that is close enough. They deliver sharp images in almost all telescopes. Oh the pain of uh having access to really cool eyepieces.). A wide-angle view of 66 degrees makes it perfect for viewing large objects and even entire constellations while still being able to focus on smaller details with ease. https://telescopicwatch.com/best-telescope-mounts-for-astrophotography/, https://telescopicwatch.com/best-astrophotography-telescopes/, https://telescopicwatch.com/best-barlow-lens-and-how-to/, https://telescopicwatch.com/celestron-8-24mm-zoom-eyepiece-review/, https://www.amazon.com/Orion-8879-1-25-Inch-Enhanced-Telescope/dp/B000BMPBLK/ref=sr_1_8?crid=3KKUJRXYYN7DI&dchild=1&keywords=telescope+diagonal+1.25&qid=1610887695&sprefix=telescope+diagonal%2Caps%2C512&sr=8-8, https://telescopicwatch.com/orion-skyquest-xt8-intelliscope-review/, https://www.rothervalleyoptics.co.uk/baader-hyperion-mark-iv-8-24mm-universal-zoom-eyepiece.html, https://www.amazon.com/s?k=Orion+Q70&ref=nb_sb_noss_2, https://telescopicwatch.com/best-telescope-eyepieces/, 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, 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. In some cases, the eyepieces are waterproof to protect them from internal contamination caused by heavy dew 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. You can buy eyepieces specifically focused on a particular scope or you can buy eyepieces that you expect to use with this and all future scopes. Generally, dont mess around with solar projection unless youre okay with damaging the instrument. EP-mm = magnification = afov They also have good eye relief, making them comfortable to use for extended periods. You probably dont need to worry about upgrading them as soon as you get your telescope, unless you can see an optical problem in the one youre using or you find the short eye relief for the short-focus eyepiece uncomfortable. I can recommend these with confidence. 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. So, even if you have a Maksutov-Cassegrain scope, you should get a good experience from this eyepiece. Many compare these favorably to eyepieces that are much higher priced. These are effectively simple designs like Plossls, Kellners, Konigs, and RKEs, with long focal lengths, that have a lens included to increase their focal length. The more light that is gathered, the more magnification that can be applied to the image, up to the limits that are imposed by the atmosphere. The Astrovid 40X60mm Zoom Telescope Camera Lens Kit is a great choice for those looking to get a variety of lenses, at different magnifications. Elena is a Canadian journalist and researcher. Sorry but I am not offering a configuration and pricing service. By having a range of magnifications, you can optimize the image, which means you need more eyepieces. Plossl telescope eyepieces are the most popular type of eyepiece on the market. I had a bino pair of TV 20mm Plossls, very fine for high power planetary observation with my long focus 8" Mak, then I also bought the older TV 21mm Plossl, after trying the 21mm I sold the more recent 20mm. A 15mm Plssl might be worth it, if you dont wear glasses. Good quality. 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. The length of eye relief on a Plossl eyepiece ranges from 12 millimeters (less common) all the way up to 45 millimeters with added benefits being that you dont have any issues seeing into your view. If you are looking at eyepieces that are wider than 55 degrees AFOV, you will again need to consider looking at the better corrected, and typically more expensive, eyepieces. 5-Minute Read, How To Increase The Magnification Of A Telescope; 5-Minute Read. So we say that an F5 scope benefits from better corrected eyepieces more than the F10 scope. As a result, this can cause aberrations in the image as you move from the center of the view toward the edges. Put the zoom on the Barlow for the high range. Plossl eyepiece is good for astronomy and microscopy. Those that still come with Huygens and Ramsdens are generally cheap and low quality, since practically the only reason to use those designs in modern times is that they are extremely cheap to manufacture. The basic design hasnt changed much, but the real costs of manufacturing have dropped. Also worth mentioning i wear glasses which I will wear while observing. Lower power almost always looks better than higher power. I think you will love it! Hi - I bought these from another AM'er 1 year or so back, thinking I will get into visual astro, But never found the inclination, So here it is for sale 9mm Nagler type 6 mint with box and caps,16mm Nagler type 5,optics are exc. Where a difference can show up is that a lower number focal ratio scope will make it harder for an eyepiece to provide a uniformly good, in-focus image all the way across the field of view due to the steeper angle that the light arrives at the edges of the eyepiece with a low focal ratio scope, as compared to a high focal ratio scope. Modified vs Unmodified DSLR Astrophotography: The Ultimate Showdown! A 2 barrel on the eyepiece will allow the manufacturer to create an eyepiece that provides a wider field of view. I did sell them all when I adopted Dioptrx, and the Naglers are amazing! Every new skill takes time. I have personally tested a few Super Plossl and compared them to their regular counterparts by the same brand. However, I have eyepieces with much smaller exit pupils and they work fine. In some cases, an object is so large (i.e., the Moon, the Pleiades, the Orion Nebula, the Andromeda Galaxy) that a narrow field of view can only show you part of the object, whereas a wider field of view could show the whole object at the same magnification. Note that the full moon appears to be approximately .5 degrees across, so use that as a mental reference when looking at the numbers. About Us | Privacy Policy | ContactLittle Astronomy 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 advertising and linking to Amazon.com. Best Telescopes For 10 Year Old Kids: Reviews and Buying Guide, The Complete Guide to the Planets You Can See With a Telescope, The Best Barlow Lenses: Reviews and Buying Guide. You are talking about the technical details of how a Barlow works, and I agree. How do you focus - I would have expected helical focusers in the eyepiece holders but don't see any? FOR SALE! It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling telescope eyepieces. The 66-degree AFOV of the Gold Line series provides a 32% wider field than Plossl eyepieces. https://www.widescreen-centre.co.uk/explore-scientific-70-eyepieces.html. but the meat of the article is about understanding the considerations and specifications to know when selecting eyepieces. So, I am going to organize the guide around five questions and four formulas. Newer multi-coatings are better, I suppose, but newer does not always mean better in the ocular game. A key thing to remember is that eyepieces are universal. the reality is that today's eyepieces are all quite good, particulalarly in an f/10 telescope. The field of view of the eyepiece has a few effects when it comes to actually using it in the telescope. Why two sizes? Now we can establish a target magnification range. https://telescopicwatch.com/celestron-starsense-explorer-dx-102-130-reviewed/, If I was to upgrade these lenses, I was planning on working toward something like this: Do you need to have the best to enjoy astronomy? This design features 4 lenses that are paired in two close-set doublets for the eye lens and the field lens. 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. SVBONY Direct . 1. My other eyepieces, ES and Meade 82 degree, stayed in the eyepiece case most of the time. This may be enough for many eyeglass wearers. You can find the eyepieces I use and recommend in this article. I generally use my 40 to search for DSOs so Ill probably replace that one at some point too. The bottom line is that it is best to have several magnification choices so you can optimize the view. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Since 2011, we've published astronomy related content and reviews to help guide the community better. For the $66/$42 of these kits, you can get one or two decent eyepieces (depending on where you buy). Are Plossl eyepieces good? If I had to give them all up and keep only one eyepiece, It would be the BH Zoom. Also, atmospheric conditions can limit how much magnification you can use on a given night. For me personally, even though I don't use glasses to observe, I still don't want to dig out the view through a plossl or ortho eyepiece which tend to have short eye relief. One of the TMB Planetary eyepieces are extremely nice for 50. Note that we also gained a 16 mm magnification at no additional cost. 50 150X, no Barlow I havent been into the hobby for long but my experience is in line with whats been said. Be sure to read the following as you consider your eyepiece purchases. Sooooo helpful! 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. Orion Sirius Plossl 10mm telescope eyepiece 1.25" in very good to excellent 185794462395 No results, please adjust your filters. However, for your extra money you get the finest manufacture, the best polish and coatings available. Consider something between 35 and 40 mm in focal length with an AFOV of 65 degrees or wider for your lowest power eyepiece for your telescope.
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