It doesnt matter what type of telescope you have, as long as your scope takes these standard sizes. To determine a magnification range, we will start with the aperture of the telescope, the size of the front lens, or the mirror in the back. Also, children do not often have highly developed motor skillsso I would avoid the frustration of switching out eyepieces, and consider a zoom lens. Nice, thank you again for the additional inputs. 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. 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. 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. SVBONY Direct . At this point, a Plossl and a Kellner are so close in price and performance that you may as well get the Plossl. In the box you'll receive 5 1.25 eyepieces at following sizes, a 32 mm Plossl Eyepiece, 17 mm Plossl Eyepiece , 13 mm Plossl Eyepiece, 8 mm Plossl Eyepiece, 6 mm Plossl Eyepiece, a 2X Barlow Lens 1.25. Etc.? A Televue Plssl may be better than a generic one, but the difference is probably not worth the additional cost. Any 1.25 diagonal should work. For one thing, a wider field of view is almost always more pleasant. Here's the short answer - Plossl eyepieces are generally better than Kellner eyepieces, but they also tend to be more expensive. Kellner eyepieces, on the other hand, are generally pretty close to each other in terms of quality so theres little chance you will get much variance in image definition between brands. For the price, I think the eyepiece is still a good pick. Your email address will not be published. Note that the full moon appears to be approximately .5 degrees across, so use that as a mental reference when looking at the numbers. While I also have the Baader Hyperion Zoom, mentioned later, I continue to make use of the Celestron, especially in my smaller scopes. The Plossl's are very easy to modify, allowing me to use the bino-viewer on, all my refracting telescopes without having to cut down the tube length, p.s. However, I have eyepieces that have larger exit pupils than 7 mm and they work well. 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. Astrophotography with Nikon D3200: Can It Be Better? Now looking for a couple of decent eyepieces. Stargazing Help is a participant in Amazon Associates program. 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. 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. On many occasions, that will be too high power for the atmospheric conditions. It costs three to four times as much as the Celestron Zoom, but if you have the budget, this is the one to get. Edited April 23, 2010 by russ teh_orph Members 28 198 Author They deliver sharp images in almost all telescopes. However, some eyepieces have an eye relief as short as 5 mm. Achromatic vs Apochromatic refracting telescopes. These low-quality Plossls lack an internally blackened lens barrel with thread baffles and blackened lens edges and sophisticated anti-reflection multi-coatings, all of which are a necessity to produce an excellent image. I have seen elsewhere discussions about the exit pupil of eyepieces. 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. Plssl eyepieces are good all-around performers, producing sharp images at the center of the field, but they have only four lens elements. My understanding of eyepieces was very limited until I read this article, you explain things in a clear and understandable way which made my understanding so much clearer. 1. However, because they have more glass elements than other designs, like Kellners, their manufacturing becomes extremely important to get high-quality optics. That is up to you and your budget. I recently purchased the SVBony 7-21 zoom from Amazon. 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. I have just one Meade product currently and that is a series 4000 1.25 inch UHC type filter which I use for outreach. 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. 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.. 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. 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. I have to say that your questions are answered in the article. 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. For planetary viewing, comfort is essential in helping to increase viewing time . This can be especially helpful in telescopes of focal ratios below F8. No price limit? Because the eyepiece was still similar enough to a Plossl and still kept the symmetrical design, they called it Super Plossl. The Plossl design has become the mainstay of the modern ocular business and probably represents the best value in terms of performance and price, especially in medium and long focal lengths. What diameter eyepieces will my telescope accept? But, if you have a plan, you can fill in those slots, working toward a well-balanced set of magnifications. If you want to buy him $200 eyepieces so he can grow into them, that works. In this article, were going to talk about what is a Plossl eyepiece, what are its components, how do they work, how many types are there and how youd buy a good Plossl eyepiece. 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. 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. Modified vs Unmodified DSLR Astrophotography: The Ultimate Showdown! These are the workhorse eyepieces of today. I dont think so. I agree with your comment on zooms for kids. Is there much of a difference between the celestron and haader? You alluded to them, but you never mentioned Tele Vue. They include links to them where they can be ordered. You can do that by using this long focal length eyepiece. I expect such eyepieces are available but I have never seen or used one. It should list what size eyepieces you can use. As to a more immersive experience, yes, I would say a wider FOV does provide a more immersive experience. By having a range of magnifications, you can optimize the image, which means you need more eyepieces. Although Kellner eyepieces will help you learn a lot in the beginning but soon will realize that youre missing out on something, and eventually you will be tempted to spend money on another good quality eyepiece. 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. We will use 10 mm as the eyepiece focal length, but we will look at three different 10 mm eyepieces, each with a different apparent field of view, AFOV. Worth it is a tough question to answer. But in this scope, the 32 mm doesnt work well. So, I am going to organize the guide around five questions and four formulas. Fortunately, the investment can be leveraged with future scopes since eyepieces are standard sizes so they work in almost any telescope. That said, I should also tell you that not all Plossls are created equal. At shorter focal lengths they have less eye relief, and at all focal lengths they have a narrower field of view, than newer types. Perhaps another review would be helpful. 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. Save my name, email, and website in this browser for the next time I comment. Apparent Field of View: This is a measure of how wide a view the eyepiece will provide as compared to alternate eyepieces. 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. All registered. You see the object in a wider expanse of space with more stars. It is all about your budget, your goals, and your objectives, as outlined in the article. I am not aware of any such solutions for Newtonian reflectors. Major telescope brands such as Celestron supplies Kellner eyepieces with their r least expensive telescopes and still may. Required fields are marked *. Can you suggest the total . A Televue Plssl may be better than a generic one, but the difference is probably not worth the additional cost. 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. The zoom can be used with any 1.25 focuser too. Why two sizes? Gosky Plossl 40 mm Telescope Eyepiece - 1.25inch This is probably the worst eyepiece I can recommend. Remember that visual and AP have very different requirements, so plan on at least two different optical tubes. Since each eye has a different focal point, I suspect pulling the eyepiece out until reaching focus and then tightening the set screw. In comparison, Aspherical lenses generally have no color distortion but might not work out well if the telescope user needs really high magnification. This is your Lexus, Acura, and Infinity types that offer more features, better build, and a bit more polish. Heres the short answer Plossl eyepieces are generally better than Kellner eyepieces, but they also tend to be more expensive. You are asking about a very specific eyepiece in a very specific scope combined sometimes with a Barlow. If you upgrade the telescope or add a second one, the eyepieces will work on that telescope too. One of the main drawbacks of this eyepiece, though, is the eye relief. For visual use, 1.5X, 2X, 2.5X, and 3X Barlow lenses are common. is pretty forgiving of eyepiece faults and a wide variety of eyepiece designs will work just fine in it. 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. Using this 40 mm Plossl eyepiece is an excellent way to get a wide field of view with your telescope. 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. 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. That can only be shown through actual testing. 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! It has made learning the Constellations and star-hopping more fun and engaging for my whole family exactly what I was hoping for. For it's cost, a 32mm Plssl eyepiece is hard to beat. Edge sharpness is just satisfactory, nothing to boast about, as is the apparent field of view. I have owned wider eyepieces, but ultimately I just prefer the Plssls (must be a mental defect). or a Baader Classic Ortho 18mm with both a 1.5/2x Barlow and 3x Barlow. Many compare these favorably to eyepieces that are much higher priced. 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. You could say Super Plossls are not much more than a marketing tactic these days. They are also good for those who have astigmatism because they are designed to be more forgiving with eye placement. Or is this overkill and am I better off saving money and going forward something like the Celestron Zoom? However, for your extra money you get the finest manufacture, the best polish and coatings available. We may earn commissions by recommending products on this website. Goldline series of eyepieces provides the best value in this price range, better than Plossls. 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. And remember, when all else fails, read the instructions. Plossl eyepiece is good for astronomy and microscopy. https://telescopicwatch.com/celestron-8-24mm-zoom-eyepiece-review/. 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. I really like the simplicity and compactness of these simpler designs (ie: Plssls, Orthos, Kellners, etc). 1.25" Power mates with T ring adapter. Orion SkyQuest XT8 Intelliscope Review Your email address will not be published. But, at least get the 32mm Plssl. I want to help you select the best eyepieces for your budget and your telescope. If one Super Plossl specifies it uses a 5 lens design, then you can definitely consider it a true Super Plossl that might offer better performance, but no brand has released any of those for decades. Offered in both 2 and 1.25, these are excellent eyepieces. Good evening everybody. These will normally be higher priced and may be outside the price range we show here. If you are very demanding and must have the very best, this is where you want to be. . Between $100 and $250, I will call it mid-range. I cant answer that specifically as I have no experience with that eyepiece in that scope. Interesting points Philip. 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. It offers good color correction and high-contrast images. 75-225X, 1.5X Barlow For what it's worth: I believe the Omni 1.25 inch 2x Barlow is one of the Shorty Barlows manufactured by GSO. Omni 32mm Eyepiece - 1.25" Learn More. In this case, I am going to define this by the focuser and eyepiece size. https://telescopicwatch.com/?s=barlow, Best of luck with your new telescope. Some will offer longer eye relief which can be important to eyeglass wearers. Also work very well with my binoculars that have removable focal reducers built into. I have the 38 mm and recommend it often. Meanwhile, Plossl eyepieces are much more common and easy to find. 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. 70 mm scope will have a max of 140X for planning purposes. This is why many telescopes come standard with at least one Plossl eyepiece. Plssl eyepieces are affordable and they're outstanding additions to amateur telescopes. 17mm Plossl, unbranded, used, no caps, in bolt case; previous owner said it was a very good EP; $18 25mm Plossl, Orion Sirius, fully MgF2 coated on every air-to-glass surface; used; $23 (these are a step up from . Look at the apparent field of view specs and understand what this means for the field of view. Get to know more about us here. If you want a very good eyepiece with a bit wider field of view but are on a budget, these are very good choices. Those are significantly more expensive than the 1.25 focal lengths. 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. They are also really sharp. They also offer a generous 16 mm of eye relief which is most important in the shorter focal lengths. Celestron's 4-element Plossl eyepiece features include blackened lens edges to minimize internal reflection and maximize contrast, fully multi-coated optics for maximum light transmission. 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. These come in focal lengths from 2.3 mm to 25 mm. But the difference in price to get to the next level is high, and the performance difference may be small. Second? This might contain more of what you need. The reason a plano-convex lens is good for using with a telescope is that it provides for both magnifying and erecting the images. I think I will go for the BHZ because, as you say, I will be able to use it now and into the future. Tele Vue has eyepieces that approach $1000. I was just wondering if plossls are still worth it or should get a better eyepiece in a 30mm range. The computerized pad and motor work on AA batteries which can last you a few hours. 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. Ive read, and re-read, and re-re-read this page. They also improve a bit when it comes to eye relief. Even if we were next-door neighbors this would take weeks of discussion and planning. The only reason it's in this list because of its price and a long focal point. Being a total novice, I love the StarSense app and technology. Youll find yourself adjusting these type of factors less than. In that respect, they are similar to the Explore Scientific 82 degree mentioned earlier. In simple terms, high focal ratio scopes, say those over F6, tend to be less demanding on eyepieces than those below F6. Very often, those eyepieces will be in the outdated 0.965 format rather than the modern 1.25 or 2 diameter barrel format. If that is the case, it will give me another reasonably good, inexpensive zoom to recommend to beginners. But for AP you should really start your planning with the mount. Oh the pain of uh having access to really cool eyepieces.). 50 150X, no Barlow So we say that an F5 scope benefits from better corrected eyepieces more than the F10 scope. I just added the 4.7 mm. 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. 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. Most likely it will be used as a loaner eyepiece to go with one of my two loaner telescopes. A Plossl eyepiece lens provides more eye relief than anything else out there! If you just want eyepiece recommendations and dont care about the details, Im adding that section right below before we go into the specifications that answer the above questions and make use of the formulas. 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. The BHZ 2 Adapter has threads on it so you can attach filters to it allowing you to use 2 filters with the zoom. Plossl eyepieces have 4 lenses that are paired in two doublets. Le migliori offerte per Celestron 1,25 pollici Omni Plossl telescopio astronomico britannico 32 mm J8R6 sono su eBay Confronta prezzi e caratteristiche di prodotti nuovi e usati Molti articoli con consegna gratis! i still use the binos. The focal length range for 1.25 Plossls is about 6mm to 45mm. Look those up, seeing and transparency in the context of astronomy. i did buy an astro-tech 3.2 paradigm ed from a cloudynights.com forum member. For example, if you put a 30 mm eyepiece in a 3X Barlow, it will triple the magnification you get from that eyepiece. 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. 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. Orion Sirius Plossl eyepieces are ideal for any type of telescope; refractor, reflector, or catadioptic. In my scopes a simple zoom eyepiece like the Celestron 24-8mm or the Baader has replaced the higher powered plossls. Of course, for the cost of the two Plossls, you could justify having them as spares or outreach EPs. All are good eyepieces and diagonals, and would be excellent for star party use. Perhaps you should seek out help from your local astronomy club. 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. If your telescopes focal length is different, just change the focal length in the formula. THANK YOU x 12! With a 130mm-F5 I would use a Plossl 32mm for its low-mag-wide-view. In retrospect, I should have included Tele Vue. Cheap to try, and if you don't like it, easy enough to sell also. 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. Brilliant article and I thank you for it, I was literally really confused prior to reading it. 32 mm = 18.75X12 mm = 50X8 mm = 75X6 mm = 100X4 mm = 150X3 mm = 200X. I dont own nor have I used it, but Orion has a very good reputation. Over time, you will likely spend more on eyepieces than on the telescope. The Big Bang Optics 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. They have a narrow AFOV but have a reputation for being very sharp.. Explore Scientific recently extended this offering by adding a series of 82 degree eyepieces labeled LER, or Long Eye Relief.
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