Note that the full moon appears to be approximately .5 degrees across, so use that as a mental reference when looking at the numbers. The first group is made up of a convex lens and concave lens, while the second one has four small cylindrical lenses that work together to magnify what you see through them for your viewing pleasure. I also struggled to see features on both (gas bands on Jupiter and clear rings on saturn). If you are completely new to stargazing, Kellner eyepieces are absolutely fine. And since this article is intended as an aid to beginners rather than a rigorous optics lesson, I think the context I provided works well enough. 32 mm = 18.75X12 mm = 50X8 mm = 75X6 mm = 100X4 mm = 150X3 mm = 200X. Omni 6mm Eyepiece - 1.25" Learn More. EP-mm = magnification = afov Plossls provide very good eye relief for eyeglass wearers in focal lengths of about 25mm and longer. Each eyepiece gives you a unique magnification based on the formula listed at the start: Why do you need more than two eyepieces? Over time, you may wish to add a specialty eyepiece here or there, but I would not make that a priority until you have filled out your magnification range. With an f/10 telescope, Plossls are as sharp as any other kind of eyepiece of the same focal length. If you are on a strict budget, this is a good choice as a zoom eyepiece. The 5-lens-element pseudo-Masuyamas that telesonic mentioned are/were fine eyepieces. That is why I suggest, if you can use 2 eyepieces, you will want one or two low power wide view 2 eyepieces. I would wait till you get the scope and use the included eyepieces. 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. is pretty forgiving of eyepiece faults and a wide variety of eyepiece designs will work just fine in it. At shorter focal lengths they have less eye relief, and at all focal lengths they have a narrower field of view, than newer types. Visual astronomy is all about aperture, the more the better. . 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. 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. I have used both Kellner & Plossl eyepieces and a few others, and I can tell you that they all are quite different from each other in terms of the quality of the image that they produce. The Plossl eyepiece has 4 lenses, consisting of 2 identical double lenses. Though not the Meade. If money is not a concern, you cant go wrong with Tele Vue eyepieces, any Tele Vue eyepieces. Plossls are extremely versatile and can be used for all use cases. The 50 apparent field of view is plenty for me. Other than the limited AFOV, which you are apparently fine with, and limited eye relief in the shorter focal lengths there is certainly no reason not to choose Plssls. They are all 4-element Plossl eyepieces, and most have a 52-degree field of view that is common to the Plossl design. So if you need to go to Arcturus and then go 2 degrees to the right to find your target, you can use the FOV of the eyepiece to estimate 2 degrees. But I have one little niggle. They have good center sharpness but exhibit some field curvature and astigmatism. Do you need to have the best to enjoy astronomy? One learns by observing. One of the main drawbacks of this eyepiece, though, is the eye relief. This is my all-time favorite eyepiece and the one I use more than all the others put together. Even if the scope comes with the more acceptable Kelner or . The eye relief is the distance between your eyes and the eyepiece where you are able to view the whole image comfortably. But with 2 eyepieces and a Barlow, you have the full effective range of your telescope. This will give you a lower power and a medium to high power eyepiece, depending on the focal length of your scope. https://telescopicwatch.com/?s=barlow, Best of luck with your new telescope. Comparing to Plossl eyepieces, Super Plossl is somewhat better for astronomy. Save my name, email, and website in this browser for the next time I comment. The Wiki article(s) were very good if anyone else is confused. The Hyperions work well in SCTs and you can't beat that large eyelens and eye relief ,JMO. The magnification range that is appropriate to your scope. I have used these in my F6 and F5 Dobs and find them a good value for the price. 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. 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. If you are just testing the waters or on a tight budget, get the Celestron, which is still pretty good. Plossls cost a bit more than the Kellners as Plossls are expensive to manufacture because they require good optical glass and precisely matched concave and convex doublet surfaces to prevent internal reflections. Us big kids like zooms too. However the package includes a 1.25 to 2 adapter so if you have a 2 focuser you can treat this like a 2 eyepiece leaving the adapter normally included with the scope for use with other 1.25 eyepieces. Despite this, I also have some Plossls which are indispensable. Good 32mm Plssls run around $30-$40. 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. Depending on how fussy you are about having a completely clean image across the visual field, if you have a lower focal ratio scope you will want to look for eyepieces with a reputation for being better corrected in low focal ratio scopes. All registered. I have an F4 Newtonian reflector and if I use an eyepiece of longer than 25 mm, an exit pupil of 6.25, I start to get a dark area in the center of the field of view which is a shadow of the secondary mirror. Here we get into the BMW, Cadillac, Porsche, and Ferrari of eyepieces. Divide that by the magnification of that eyepiece in that scope. Are there any good low-cost 2 EPS out there? Low focal ratio scopes deliver the light rays to the eyepiece at an ever-increasing angle as the focal ratio number goes down. Can you give me any specific recommendations on what to buy and from where? If we combine a Barlow with an 8-24 mm zoom eyepiece, we have an amazing range. Field of view, is about finding, framing, drift time, and context. Both solutions offer somewhat similar mag-fov-er-price. Higher priced eyepieces usually include more elements in the optical path that are there to help reduce or eliminate aberrations that can be seen around the edges of lower cost eyepieces. These are highly sought after ep's, and hold their value well. On many occasions, that will be too high power for the atmospheric conditions. The 26 and 32 are usually the first ones I reach for. The atmosphere is typically the limiting factor as we get to higher magnifications. They deliver sharp images in almost all telescopes. You can read a thorough review of Goldline eyepieces here. SVBONY Telescope Eyepiece Set Telescope Accessory Kit with 2x Barlow Lens 4 Element Plossl Design 6.3mm 32mm 40mm for Astronomical Telescopes. I had a TV 20mm Plossl once. 1:10 . As the clear cut worlds best eyepiece manufacturer, their name should at least be mentioned in an article like this. Hayppy that now I have more facts to put in my decision. The image quality is very good and the additional field of view and longer eye relief makes them very comfortable to use. 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.) You mentioned regarding ORTHO eyepieces: Excellent specialty eyepieces, usually for planets. This type of design also helps provide for eye relief; its a better experience if your eyes. the reality is that today's eyepieces are all quite good, particulalarly in an f/10 telescope. That is the critical factor. And new proprietary designs come out from time to time. However, there can be a problem bringing the eyepiece into focus. 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. Most telescopes come with one or two eyepieces. Over $250, I will label premium eyepieces. 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 couldnt find any suggestions on your site about diagonal recommendations. So, if your scope is F6 or lower, you may want to consider some of the higher priced, better corrected eyepieces if you want the best image to the edge of the field. No results, please adjust your filters. Some reviews also suggest replacing the diagonal. All focal lengths offer 50 field-of-view except the 40mm which offers 42 So yeah, they are good.. and some are even better than others, and more collectible. In this article, we will only focus on the differences between Plossl and Kellner eyepieces. They are most useful in medium and longer focal lengths for terrestrial, planetary, and lunar viewing. In addition, the eyepiece would be a Huygens or Ramsden design, where two lenses made of the same type of glass could be combined to yield minimal false color fringing, as long as the focal length of the telescope remained fairly long. Hi Ed, that is really helpful sorry if this is a daft question but is the baader hyperion 2 or 1.25 or can it be both? Being a total novice, I love the StarSense app and technology. Aspheric and Plossl Plossl are both lens designs that can be used in most telescopes. It was named after Peter Barlow who invented it in the 1800s, so it is usually capitalized. It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling telescope eyepieces. I have not had an opportunity to test it yet but the general discussions have favorable. I agree. FOR SALE! 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. We can see that 2 eyepieces have an advantage over 1.25 eyepieces when designers are making wide-view eyepieces. If you are buying your first telescope, and you are choosing between the telescope that includes a Kellner or a telescope that comes with a Plossl, with all the other specs being similar, pick the telescope thats offering you the Plossl, even if its slightly more expensive. It all comes down to cost-benefit. condition as described, a good transaction. Omni 12mm Eyepiece - 1.25" Learn More. 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. They provide a range of magnifications with one eyepiece. I have CPC 925 and I currently own Hyperion 10mm, Hyperion 17mm and Celestron plossl 40mm. A Televue Plssl may be better than a generic one, but the difference is probably not worth the additional cost. The BHZ 2 Adapter has threads on it so you can attach filters to it allowing you to use 2 filters with the zoom. 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. Generally, dont mess around with solar projection unless youre okay with damaging the instrument. The 21mm is simply amazing, I can't believe that TV decided to discontinue this little gem, it is better than the newer version in every category including eye comfort, the overall shape along with fit and finish is one of the best from TV. . The original Meade 5-piece Super Plossl hasnt been in production for decades and at this point is more of a collectors item than a high-performance eyepiece. When I was getting my start in the hobby, I bought an ultra-cheap ($15?) No price limit? https://www.amazon.com/s?k=Orion+Q70&ref=nb_sb_noss_2, Understanding Telescope Eyepieces- There are recommendations, based on budget, . Most likely it will be used as a loaner eyepiece to go with one of my two loaner telescopes. I was just wondering if plossls are still worth it or should get a better eyepiece in a 30mm range. 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. Orion SkyQuest XT8 Intelliscope Review That is up to you and your budget. Fortunately, the investment can be leveraged with future scopes since eyepieces are standard sizes so they work in almost any telescope. Think of these as your Ford, Chevy, and Toyota of eyepieces. Over time, you will likely spend more on eyepieces than on the telescope. Goldline series of eyepieces provides the best value in this price range, better than Plossls. Looking forward to first use. The three-lens eyepiece that came out of this was much better at controlling false color fringing and other distortions, even in telescopes with short focal lengths. https://telescopicwatch.com/celestron-8-24mm-zoom-eyepiece-review/. Stargazing Help is a participant in Amazon Associates program. If I had to give them all up and keep only one eyepiece, It would be the BH Zoom. 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. Kellners are the other popular design for amateur stargazing, go ahead and check out that article if you want to dive deeper into the subject. Like going from a 32 TV to a 65? Meade went back to the drawing board and they removed the fifth element, keeping the original Plossl design, however, they kept the Super Plossl brand and added some premium materials. I recommend it often to beginners on a tight budget. It sounds cool, they must be better than regular Plossls with that name, right? 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. It is as simple as that. Why not go back to the people who sold you the scope and get their help. In the next section, we will talk about the AFOV of an eyepiece. It uses two symmetrical pairs of glass elements (one convex and one concave) to pass the light. short answer: yes. But just because an eyepiece is 2 doesnt mean it has a wider field of view than one that is 1.25. These eyepieces are technically called Symmetrics, since Plossls can have different focal lengths for each doublet, but they are always marketed as Plossl. However, the BH Zoom is by far my most used eyepiece. that I could slide into my telescope and look at. If we want to get VERY specific to a combination then inherent aberrations of this scope and that eyepiece could produce a unique result. To achieve a maximum of 200X (2X the aperture of 100 mm), we solve for the focal length. 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! After these, we have mostly proprietary designs from various eyepiece companies. 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. Is there much of a difference between the celestron and haader? This is not a hard and fast rule, just a cautionary note. Omni 9mm Eyepiece - 1.25" Learn More. There is the 56mm Meade Plossl which magically turns my short FL refractors into their own finder scopes. Plossl eyepieces are often included in better telescope packages as the starter eyepieces. I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. These are matters of individual preference and budget. Type above and press Enter to search. The generic GSO Plssl from many manufacturers, including Astronomics (Astro Tech) and Agnena Astro, is as good as the Celestron and a few bucks cheaper. Besides fov, How would you compare the optical quality of the Celestron to the Baader? Is it just about finding and framing, or do wide fov EPs create a more immersive experience? However, i can read very well without my glasses with almost microscopic vision and can use my binoculars without glasses. By having a range of magnifications, you can optimize the image, which means you need more eyepieces. Wide view and well-corrected view, even in F5 scopes. They include links to them where they can be ordered. I generally use my 40 to search for DSOs so Ill probably replace that one at some point too. My other eyepieces, ES and Meade 82 degree, stayed in the eyepiece case most of the time. You can build a full set of these with good results, but be aware of eye relief, especially if you wear glasses. I have a variety of eyepieces, including Explore Scientific and Meade 82 degree series so I have choices. These lenses are connected together. 32 mm = 18.75X 16 mm = 37.5X (32 mm eyepiece with a 2X barlow), 12 mm = 50X (If you have a 25 mm that came with your scope, use Barlow for 12.5 mm), 4 mm = 150X (8 mm eyepiece with a 2X Barlow), 3 mm = 200X (6 mm eyepiece with a 2X Barlow), 24 mm = 25X (the low power end of the zoom), 8 mm = 75X (24 mm zoom setting in a 3X Barlow), 2.66 mm = 225X (8 mm zoom setting in a 3X Barlow), True field of view or FOV = Apparent field of view (AFOV) eyepiece / magnification. Once I knew how much I liked the zoom I upgraded to the Baader Hyperion Zoom. 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. Eye relief of less than 10mm gets really uncomfortableyou tend to rub your eyepieces against the eyepiece or lens, and you have to hold your eye at just the right distance to keep from touching the lens. So its best for use during duller times when there isnt much brightness visible. Later in the article, I will also give my top recommendations for both the best Kellner as well as the best Plossl eyepieces. Youd have to look into more complex designs which include a barlow lens, or simply use a longer focal length eyepiece with a quality barlow. Lets give an example. Your email address will not be published. Better edge correction with a short-focus telescope is one of the things you pay extra money for, and sophisticated eyepiece designs have as many as eight elements. Today, most beginner telescopes of any quality are sold with either Kellner or Plossl eyepieces. In the case of the Celestron, you get all the focal lengths from 24 to 8mm in one eyepiece that costs $100. 1.25" Power mates with T ring adapter. But the conventional way of expressing it is in terms of eyepiece focal lengths. In our example, we targeted 200X as the top magnification. 75-225X, 1.5X Barlow 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. If you want to buy him $200 eyepieces so he can grow into them, that works. Explore Scientific 68 34 mm or ES 82 30 mm would also be good choices at a significantly higher price but with better edge correction. 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. Combining a cheap eyepiece with a cheap barlow isn't a elegant solution. They all work, but as you go up in price, you gain features or performance or both. Lets illustrate with an example using a 1200 mm FL telescope. Thanks for a very helpful guide. 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. Put the zoom on the Barlow for the high range. Many thanks, Sophie. Explore Scientific, like many eyepiece providers, have higher-priced and budget lines. i still use the binos. The big problem with Plssls is that the eye relief is about 0.75 times the focal length. As you learn more about astronomy and you gain more experience with time, you may want to move to Plossls or even higher-quality eyepieces. Or is this overkill and am I better off saving money and going forward something like the Celestron Zoom? A wide range of focal lengths are available, all in 1.25-inch size. I do not miss beating my eyelashes against a 9.7mm Meade Plossl that I used to own. Gold line eyepieces are available in 6mm, 9mm, 15mm, and 20mm focal lengths. None of my fancy EPs have enough contrast for this application. Now we just divide it up and fill in some sample focal lengths. You can add the specialty single FL eyepieces later if you wish. 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. They work great every day and get you where you want to go, but dont have what the higher priced models have. Your email address will not be published. For astronomical observations, such as viewing craters on the moons surface from Earth, high-magnification models are preferred because they offer more detail. However, because they have more glass elements than other designs, like Kellners, their manufacturing becomes extremely important to get high-quality optics. 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. Yes, Plossl eyepieces are some of the most popular with amateurs and professionals alike. 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. Recall that your lowestpower eyepiece's exit pupil should not exceed 6mm. If you want to observe the fine details of a specimen, Plossl eyepiece has a higher magnification than an ocular with lower lenses. I believe the 5000 UWA's are good as well. Then set your maximum based on your aperture and split it up. 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. 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. These tend to run toward the more expensive price range. These and the essentially identical AT Paradigm are universally praised as good quality eyepieces with a wider 60-degree apparent field of view. Or, you can have three properly sized eyepieces and use a Barlow lens to achieve three more magnifications, which is usually a less expensive way to go. I owned an XT8 Intelliscope which is the same optical tube on a PushTo mount. So, I am going to organize the guide around five questions and four formulas. But dont fear that you will waste your investment as eyepieces are standard sizes. 8.5-ish mm (75x & 150x) In retrospect, I should have included Tele Vue. i dont have 1 of everything, and i bought the best i could afford on a low budget; meade and orion. This general purpose design gives good colour correction and an adequate feld of view at reasonable cost and they are often bundled with new 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 . These come in focal lengths from 2.3 mm to 25 mm. But what are the other differences? Now here is something that some of us classic scope nuts know - there are plossls, and there are plossls. The ES 82s are my favorite eyepieces, especially in the 1.25 format. What Is A Barlow Lens For A Telescope? 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. A Plossl eyepiece is one of the most decent general-purpose eyepieces that are available on the market. You can do that by using this long focal length eyepiece. Plossl eyepieces are perfect for astronomical viewing because the field of view is wider. And the zoom provides every magnification in that range without having to change eyepieces. Be sure to read the following as you consider your eyepiece purchases. I hope I can say that someday. Look at the apparent field of view specs and understand what this means for the field of view. OHHH, now i get it! For super Plossl eyepiece, the field of view is typically 40 to 60 degrees. The Baader offers wider fov, but at quite the price premium. As for Barlow Lenses, take a look at this article. 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. Its quite long but that is what we are aiming for and hopefully, it was useful to you. The only reason it's in this list because of its price and a long focal point. If your focuser/diagonal will accept 2 eyepieces, then I will suggest you get one or two 2 eyepieces for your low power wide view eyepieces. Plossl eyepieces are typically used for observing and viewing things at long distances, but they can also be useful when using a telescope to provide both magnifying power and erecting the images. However, for your extra money you get the finest manufacture, the best polish and coatings available. Ah I see what you are saying, I had wondered whether this might have had an impact as Ive seen it mentioned before but dont fully understand it so will do some research, thank you . 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. Our previous exchange convinced me to start out with an 80mm refractor. 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. 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. Plossl telescope eyepieces are the most popular type of eyepiece on the market. I have owned wider eyepieces, but ultimately I just prefer the Plssls (must be a mental defect). Other brands have joined and have used the Super Plossl label, but they all keep the original 4-piece design. Understanding and using a Barlow Lens This determines how much light the telescope will gather. 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". All the rest will likely be 1.25. did i pass? Even if we were next-door neighbors this would take weeks of discussion and planning. And I continue to read excellent reports on the AT Paradigm and similar under different labels. 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. Kellner eyepieces work perfectly with small and medium-sized telescopes. Because the eyepiece was still similar enough to a Plossl and still kept the symmetrical design, they called it Super Plossl. Plossl eyepiece is one of the reasonable options when it comes to telescope eyepieces for stargazing or astronomy. 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?
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