They have a narrow AFOV but have a reputation for being very sharp.. 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. Generally, to maximize the number of stars you see in an eyepiece with a given telescope, both the magnification and field of view should be maximized. 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. (often referred to as Pseudo Masuyama). Celestron 2026 Erecting Prism Barlow Lens Set is another great choice for those looking to get a variety of magnifications. If you just want a quick answer, skip to the conclusion at the end of the article. 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. Theres a wide range of quality when it comes to Plossls and trusting the brand you are getting one from matters a lot if you dont want to get an eyepiece with lots of reflection or optical issues. Plossl and Kellner eyepieces are two very common examples of a simple eyepiece design, and they are probably the most common type of eyepiece you are likely to come across when eyepieces have been bundled with a telescope; they are also a very common aftermarket accessory. There are certainly much better options out there but at a significant cost. While many people will stay with and add Plossls to their eyepiece set, I would recommend not going below 10 mm focal length as the eye relief gets quite short. 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. Kellner eyepieces have 3 lenses cemented together and have a 35-50 degree field of view. thanks for all your help. I still have it and still use it from time to time. You also get 7 1.25 filters which include the following, #80A Blue Filter, #58 Green Filter, #56 Light Green Filter, #25 Red Filter, #21 . However, because they have more glass elements than other designs, like Kellners, their manufacturing becomes extremely important to get high-quality optics. For what it's worth: I believe the Omni 1.25 inch 2x Barlow is one of the Shorty Barlows manufactured by GSO. 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. thanks Ed. The basic design hasnt changed much, but the real costs of manufacturing have dropped. From planetary viewing to deep sky watching. 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. Features : 5 superior-grade Plossl eyepieces: 1.25-in, 4-element design with a 52 AFOV (32mm has 44)4mm, 6mm, 9mm, 15mm, and 32mm . She has been looking at the sky for years and hopes to introduce more people to the wonderful hobby that is astronomy. 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. Kellner vs Plossl - Comparison table. I really enjoy usingPlssls. No price limit? This is a fairly inexpensive zoom that I wanted to try. There is one aspect in which a Kellner can actually outperform a Plossl: eye relief. You could say Super Plossls are not much more than a marketing tactic these days. Newer multi-coatings are better, I suppose, but newer does not always mean better in the ocular game. This is not a hard and fast rule, just a cautionary note. No surprise there. A 32mm Plssl is worth it. 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. That is why I suggest, if you can use 2 eyepieces, you will want one or two low power wide view 2 eyepieces. Any 1.25 eyepiece will work with the BH Zoom 2 adapter. Hi Ed, The BHZ in a 2X Barlow will take an XT8 to 300X. I want to help you select the best eyepieces for your budget and your telescope. Orion Sirius Plossl 1.25" eyepieces are ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains. 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. 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. 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. Achromatic vs Apochromatic refracting telescopes. They are most useful in medium and longer focal lengths for terrestrial, planetary, and lunar viewing. No other type can compare with it when it comes to that quality. Hello sir, thanks for your article its realy helpful. . At 32mm, a Plssl will give you as wide a field of view as any 1.25mm eyepiece can. To achieve a maximum of 200X (2X the aperture of 100 mm), we solve for the focal length. Plossl eyepiece is good for astronomy and microscopy. Thanks all. 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. At that price point, it couldnt compete with other 5-element devices like Erfle and Nagler eyepieces that had better performance. In comparison, Aspherical lenses generally have no color distortion but might not work out well if the telescope user needs really high magnification. 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. Not really. A decent barlow might cost as much or even more. If you plan to go longer than that you can get an AC adapter or a power tank. Warranty Limited Warranty against defects in materials or workmanship for one year from date of purchase. What happens if you use an eyepiece that has a the wrong exit pupil? As the clear cut worlds best eyepiece manufacturer, their name should at least be mentioned in an article like this. https://telescopicwatch.com/?s=barlow, Best of luck with your new telescope. There are three types of Plossl eyepiece: the regular, Super, and Orthoscopic. If you are very demanding and must have the very best, this is where you want to be. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. Overall, I would highly recommend the goldline eyepieces. It costs a lot to get that last 10% of performance. Focal length telescope / focal length eyepiece = magnification or power. Plus the FOV expands as you zoom to the higher powers. Learn more about our story and the team behind the scene. Thanks for a very helpful guide. 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. Also worth mentioning i wear glasses which I will wear while observing. Sony A7III vs A7RIII Astrophotography: Which One to Shoot Infinity! You can accomplish a longer eye relief by barlowing a longer f/l plossl, so that is something to think about as well. Its quite long but that is what we are aiming for and hopefully, it was useful to you. Plossl eyepieces are often included in better telescope packages as the starter eyepieces. My 20, 26, and 32mm Plossls will probably stay around. These eyepiecesproduce a 'standard apparent feld of view' of between 50 and 56 with most set at around 52. It offers good color correction and high-contrast images. (Svbonys Plossls, for example, are optically identical to Orions Sirius Plossls). Using your example: We will use a 100 mm telescope with a 600 mm focal length and Another way to look at it is that a 30 mm eyepiece in a 3X Barlow works like a 10 mm eyepiece.. These and the essentially identical AT Paradigm are universally praised as good quality eyepieces with a wider 60-degree apparent field of view. In your case, I would do this for the 30 and the 20. I need some eyepieces with long FL for low magnifications. The Plossl has good color correction plus is free of the ghost images that plague the Kellner. Are plossl eyepieces still worth it? However, sometimes i am at the end of the range of the binocular focus adjustment. And I am a visually observing focused person. When I was getting my start in the hobby, I bought an ultra-cheap ($15?) The 4000 SWA's were way overpriced for their performance IMHO. 8.8 = 240 = .34 The field of view of the eyepiece has a few effects when it comes to actually using it in the telescope. 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. 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. This was my first zoom eyepiece and the one that caused me to fall in love with zoom. Free shipping for many products! In stargazing, eyepieces are as important as telescopes are. They all work, but as you go up in price, you gain features or performance or both. The third choice of eyepieces is the Orion 12 mm Sirius Super Wide Angle Correct Image Eyepiece. If you look up transparency and seeing in the context of telescopes you can learn more about how atmospheric conditions will affect what magnifications you will choose on any given night. The Plossl optical design is very good for long and medium focal length eyepieces, delivering a sharp, flat field and an apochromatic image. This determines how much light the telescope will gather. I cannot thank you enough! Does this sound like something you would recommend based on the telescope I have? Is it just about finding and framing, or do wide fov EPs create a more immersive experience? A 2 barrel on the eyepiece will allow the manufacturer to create an eyepiece that provides a wider field of view. Im also uncertain about what to expect from an additional investment? I often had to drop back to about 180X because of poor seeing and transparency. 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. You will get varying opinions on this but I would not worry too much about this. 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 havent addressed .965 eyepieces in the recommendations. 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. For visual use, 1.5X, 2X, 2.5X, and 3X Barlow lenses are common. Lets take a look. 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. - 32mm plossl. It's one of the best choices you have when it comes to budget stargazing. I currently own a Mak127 ( that can't use 2"eyepieces) and a 80ED ( that one can hold 2"eyepieces). Eye Relief: This refers to how close your eye has to be to the lens in order to see the full field of view. Worth it is a tough question to answer. I have seen wider-field Plossls. In essence the design differences between Kellner and Plossl comes down to the number of lenses within the eyepiece barrel. It also produces an erect image, meaning you see what youre viewing rather than seeing everything upside down or sideways as some types do. Since each eye has a different focal point, I suspect pulling the eyepiece out until reaching focus and then tightening the set screw. Know what diameter eyepieces your scope takes.
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