Because of this setup, you might also hear a Plossl eyepiece referred to as a symmetrical eyepiece. I would recommend the Baader Hyperion Zoom for any telescope. 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. A Kellner eyepiece has 3 lenses, while a Plossl has 4. I have Celestron and the Baader Hyperion. I dont own nor have I used it, but Orion has a very good reputation. I am very near-sighted, barely see the big E on the vision chart without glasses. Most modern telescopes use a focuser, or diagonal, that accepts 1.25 eyepieces. I think I will go for the BHZ because, as you say, I will be able to use it now and into the future. It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling telescope eyepieces. And that is pretty much what Super Plossl are today. These are matters of individual preference and budget. Scott. For super Plossl eyepiece, the field of view is typically 40 to 60 degrees. Offered in both 2 and 1.25, these are excellent eyepieces. 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. This would definitely matter to observers who wear eyglasses when viewing. You can build a full set of these with good results, but be aware of eye relief, especially if you wear glasses. They have a 50-56 degrees field of view, better eye relief, and cost more than Kellners. Put the zoom on the Barlow for the high range. Am I correct? 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. Comparing to Plossl eyepieces, Super Plossl is somewhat better for astronomy. 8.5-ish mm (75x & 150x) Thanks, Angelo M. You picked a great first scope. But for AP you should really start your planning with the mount. Plossl eyepieces have 4 lenses that are paired in two doublets. Tele Vue offers several series with apparent fields of view from 50 degrees to 120 degrees. The Plossl eyepiece has 4 lenses, consisting of 2 identical double lenses. Question: would an 18mm Baader Classic Ortho mostly used for Moon and planets loose sharpness and contrast if used with a short F5 telescope like the Celestron Astro-Fi 130? Offering a wide 43 apparent field of view, this 40mm Orion Sirius Plossl Telescope Eyepiece provides extremely sharp images of impressively high contrast. Orion Sirius Plossl 10mm telescope eyepiece 1.25" in very good to excellent 185794462395 I cant answer that specifically as I have no experience with that eyepiece in that scope. Just search on Astronomy Club and you will probably find one in your area. Note to spectacle wearers: Plossl eyepieces with 15mm and longer focal lengths are good choices for spectacle wearers but for shorter focal lengths the Celestron XCel LX series have greater eye-relief so are better suited. 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. As a result, this can cause aberrations in the image as you move from the center of the view toward the edges. You can email me also. For what it's worth: I believe the Omni 1.25 inch 2x Barlow is one of the Shorty Barlows manufactured by GSO. We have compared Plossl against Kellner eyepieces in a previous article. Then you can judge for yourself if it is worth it. How Good Are Super Plossl Eyepieces for Astronomy? It is pretty much worth it for everyone that has a telescope with a 1.25 inch focuser to have a 32mm Plssl. The Expanse is a lens that provides an extra sharp image, and it also has a wider field of view compared to the Plossl eyepiece. When discussing eyepieces, you will hear people comment on how well the eyepiece is corrected. Newer multi-coatings are better, I suppose, but newer does not always mean better in the ocular game. With a 8" dobsonian, a 6mm is very versatile. Or we say that F10 would be easier or less demanding on the eyepiece than the F5. 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. I have a variety of eyepieces, including Explore Scientific and Meade 82 degree series so I have choices. They all work, but as you go up in price, you gain features or performance or both. Looking forward to first use. Have Any Astronauts Been Lost in Space Forever. It had one of the best fields, edge to edge, in my SCT that I've ever seen. It is as simple as that. These eyepieces have about 35 to 50 degrees apparent fields of view and reasonable eye relief, though quite short for high magnifications. Low focal ratio scopes deliver the light rays to the eyepiece at an ever-increasing angle as the focal ratio number goes down. I need some eyepieces with long FL for low magnifications. As we go up in price range, we gain capabilities that may not be immediately obvious. We will use a 100 mm telescope with a 600 mm focal length that only takes 1.25 eyepieces. Thanks for going through the entire post. This is where the second formula comes into play. I had one and sold it. a breath of fresh air! The eye relief is the distance between your eyes and the eyepiece where you are able to view the whole image comfortably. However, some eyepieces have an eye relief as short as 5 mm. No other type can compare with it when it comes to that quality. These are two very important considerations when you are looking for eyepieces. If you are new around here and you want to get started with the hobby, check out our astronomy for beginners guide or the recommended gear page. Stargazinghelp.com is a knowledge hub for professional and amateur astronomy and astrophotography enthusiasts. Most of Celestrons entry-level telescopes are sold with Kellners (and other cheap but reasonable-quality designs like RKEs or Konigs), whereas their more expensive SCTs tend to come with a single 25mm Plossl. That is a really interesting picture. With regards to budget, whatever works well and is on par with the quality & capability of the telescope. A Plossl eyepiece has a lens thats plano-convex, which means it is flat on one side and convex on the other. One of the main drawbacks of this eyepiece, though, is the eye relief. However, I have eyepieces with much smaller exit pupils and they work fine. Required fields are marked *. Finally, a wider field of view just makes it easier to find stuff. For it's cost, a 32mm Plssl eyepiece is hard to beat. 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. Understanding and using a Barlow Lens At 32mm, a Plssl will give you as wide a field of view as any 1.25mm eyepiece can. As for Barlow Lenses, take a look at this article. This means less time trying to figure out which way your images should be oriented before examining them. Any exit pupil between 7 mm and .5 mm is just fine. 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. The Hyperions work well in SCTs and you can't beat that large eyelens and eye relief ,JMO. 6mm Kellner eyepiece that I enjoyed a lot. And new proprietary designs come out from time to time. I would expect it to be similar to the Celestron in image quality. > Click here to jump to the Best Eyepieces section. 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. For what it is worth, a slow scope like your CPC9.25 (f/10?) 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. 4. For modern eyepieces, the differences between Plossl and Super Plossl is going to depend on the manufacturer. If you are completely new to stargazing, Kellner eyepieces are absolutely fine. 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. These will eventually be used in an 8in dob whenever it arrives. Through the 32mm eyepiece, objects will look larger, and though they may have a lower surface brightness, the surface brightness of the background sky will also be lower. They can also be found as Orion Expanse sporting a blue line rather than gold. They are also good for those who have astigmatism because they are designed to be more forgiving with eye placement. Orion Sirius Plossl 1.25" eyepieces are ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains. I recommend it often to beginners on a tight budget. Ideally, you want a minimum of three eyepieces for (1) low power (2) peak visual acuity and (3) high-power viewing. It uses two symmetrical pairs of glass elements (one convex and one concave) to pass the light. If you are very demanding and must have the very best, this is where you want to be. In most cases, these are eyepieces that are focused on wider AFOV or better correction for low focal ratio scopes. 50 150X, no Barlow The Plossl was also called a Kellner Type III in some earlier references; in the 1950's, Edmund Scientific sold a "Kellner" eyepiece made from war surplus lenses, but it actually consisted of two achromats in the classic Plossl configuration. Your email address will not be published. I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. 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? (often referred to as Pseudo Masuyama). Plossl eyepieces have wider fields of view than Kellners. The Plossl eyepiece is a four-element design consisting of two doublets. The components of a Plossl eyepiece are the two groups of lenses. Gold Line eyepieces also offer better eye relief than Plossl eyepieces, especially at the shorter focal lengths. However, you may see them at higher prices for the short term. My 20, 26, and 32mm Plossls will probably stay around. 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. 3. It's no surprise that the eyepieces in our Sirius Plossl line are our best-selling telescope eyepieces. We can see that 2 eyepieces have an advantage over 1.25 eyepieces when designers are making wide-view eyepieces. . Lower power almost always looks better than higher power. 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. This is my all-time favorite eyepiece and the one I use more than all the others put together. As I discussed earlier, the zoom lets you explore your target over a wide range of magnifications without having to change eyepieces. If that surface is wobbly the scope will be almost useless. Below .5 mm exit pupil, floaters in the eye become more apparent and can be bothersome. Some accept 2 and have an adapter that allows you to also use 1.25. Once I knew how much I liked the zoom I upgraded to the Baader Hyperion Zoom. A rubber safety cap protects the lens when not in use while also providing additional grip on this 35 mm Plossl eyepiece. In essence the design differences between Kellner and Plossl comes down to the number of lenses within the eyepiece barrel. They are not that expensive I would pay about $100 for both eye pieces. The 26 and 32 are usually the first ones I reach for. In my opinion, there are no wrong exit pupils. 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 quality of a Plossl eyepiece completely depends on the brand and model, so be very careful in our selection. All the rest will likely be 1.25. Also worth mentioning i wear glasses which I will wear while observing. I am looking for as much as best I can buy. Plus the FOV expands as you zoom to the higher powers. 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. 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. Apparent Field of View: This is a measure of how wide a view the eyepiece will provide as compared to alternate eyepieces. Despite this, I also have some Plossls which are indispensable. Thinking in a super ploss 32mm and maybe something between 9mm and 15mm . The ES 82s are my favorite eyepieces, especially in the 1.25 format. A large field lens makes the ocular easy to look into. Here are a few types of eyepieces you may read about and their typical AFOV. Note that we also gained a 16 mm magnification at no additional cost. That can only be shown through actual testing. https://www.widescreen-centre.co.uk/explore-scientific-70-eyepieces.html. 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. i did buy an astro-tech 3.2 paradigm ed from a cloudynights.com forum member. They are most useful in medium and longer focal lengths for terrestrial, planetary, and lunar viewing. 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. EP-mm = magnification = afov To get the best performance, you have to be willing to pay the price. OHHH, now i get it! 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". It was grueling, because I couldnt even get the entire field of viewI had to keep my eye hovering above the exit pupil. A long eye relief is also important for those who wear eyeglasses at the eyepiece, whether thats a member of the general public at a star party or an astronomer with astigmatism, which, unlike near- or far-sightedness, cannot be corrected with the telescopes own focuser. This type of design also helps provide for eye relief; its a better experience if your eyes. I havent addressed .965 eyepieces in the recommendations. A typical zoom eyepiece has a focal length range of 8 mm to 24 mm. These sport a 60-degree apparent field of view, about a 20% wider apparent field of view than Plossl eyepieces. I often recommend it. I found an ES 70 degree AFOV 35mm eyepiece and am wondering whether I should get this or the Orion 38 70. An exit pupil larger than 6 mm may start to show a shadow of the secondary mirror. If you just want a quick answer, skip to the conclusion at the end of the article. These sizes have become the industrys standard sizes. Aspheric eyepiece is a variation of Plossl design, it has an anti-reflection coating on the front glass surface to ensure maximum light transmission and will also provide your instrument with better quality images if you need higher magnification levels. Customer reviews Average Rating (16 Reviews): Write a Review and share your opinions! In my opinion, you do not. The difference in TFOV will be significant at this focal length. Many compare these favorably to eyepieces that are much higher priced. It also was considerably more expensive. But you need to know, first, if you will be wearing glasses when you observe. But, if you have a plan, you can fill in those slots, working toward a well-balanced set of magnifications. When I was getting my start in the hobby, I bought an ultra-cheap ($15?) But what are the differences between these two and how do you know which one to choose? 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 . Plossl eyepieces have a wider field of view that can go from 50 to 56 degrees. Plossl eyepieces have an eye relief equal to about 80% of their focal length. Recall that your lowestpower eyepiece's exit pupil should not exceed 6mm. I expect such eyepieces are available but I have never seen or used one. 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. In your case, I would do this for the 30 and the 20. Telescopes Cost: Acceptable, Good, and Really Good Telescopes, Used Telescopes Buying Guide The Complete Guide, Different Types of Asteroids (C, S, and M) The Definitive Guide, Top 10 Night Sky Objects for Astronomy Beginners, Asteroid Mining Know Everything About It, German Equatorial Mounts (GEMs) Overview and Working. no caps come in bolt case. 1:10 . However, I have eyepieces that have larger exit pupils than 7 mm and they work well. It is all about your budget, your goals, and your objectives, as outlined in the article.
are plossl eyepieces good