Low focal ratio scopes deliver the light rays to the eyepiece at an ever-increasing angle as the focal ratio number goes down. Again, this is more noticeable in lower focal ratio scopes. 4mm Eyepiece vs 20mm Eyepiece. The zoom can be used with any 1.25 focuser too. Note that the full moon appears to be approximately .5 degrees across, so use that as a mental reference when looking at the numbers. Both solutions offer somewhat similar mag-fov-er-price. This eyepiece was even better at correcting false color fringing, but because of internal reflections, the glare was even worse. Save my name, email, and website in this browser for the next time I comment. If you plan to go longer than that you can get an AC adapter or a power tank. Note that as we get into the higher magnifications, the millimeter jumps between eyepiece focal lengths gets smaller. 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. Then there is the rule of thumb to avoid duplicating focal lengths when acquiring eyepieces. Another really helpful article, Ed. Look those up, seeing and transparency in the context of astronomy. I have seen elsewhere discussions about the exit pupil of eyepieces. As long as you take good care of them, Plossls can last you a lifetime, and you will be able to use them with your next telescope if you upgrade at some point. Oh the pain of uh having access to really cool eyepieces.). Am I correct? I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. Most telescopes come with one or two eyepieces, which gives you one or two magnification options. I have owned wider eyepieces, but ultimately I just prefer the Plssls (must be a mental defect). I am looking for as much as best I can buy. These lenses are connected together. Offering a wide 43 apparent field of view, this 40mm Orion Sirius Plossl Telescope Eyepiece provides extremely sharp images of impressively high contrast. PS. Celestron 2026 Erecting Prism Barlow Lens Set is well suited as an astronomical viewing lens kit or for enjoying terrestrial sights like nature walks, sporting events, and more! Plossl eyepiece is one of the reasonable options when it comes to telescope eyepieces for stargazing or astronomy. Is there much of a difference between the celestron and haader? Something in the 30 to 38 mm range with a 65 to 70 degree AFOV. Suggesting an F6 scope becomes an F18 would also imply things like reduced CA in a refractor. This saves money and helps you shop in an organized manner. A 20mm Plssl is probably worth it, if for no other reason than to compare the views it gives to the 21mm Hyperion you have. 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. Finally, the worldwide pandemic has led to shortages and price jumps on many items. 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. These are just a few examples of eyepieces that I have used, and some that I own. On the inside, they are exactly the same design. Now we can establish a target magnification range. Higher than 3X is usually reserved for astrophotography. 8.5-ish mm (75x & 150x) Nice, thank you again for the additional inputs. If you go this route, you can always add single focal length eyepieces along the way to serve specialized purposes. Regular Plossl eyepieces with maybe just a slightly better coating or build quality. I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. Sometimes you want to see a wider field of view to locate an astronomical object like a nebula by using nearby stars. 70 mm scope will have a max of 140X for planning purposes. A rubber safety cap protects the lens when not in use while also providing additional grip on this 35 mm Plossl eyepiece. ES 82 degree series plus 1 meade uwa @20 mm with 1800 focal length optical tube lowest mag 51 x / highest mag 300. or a Baader Classic Ortho 18mm with both a 1.5/2x Barlow and 3x Barlow. One last thing, as a kid I used my telescope to watch squirrels and birds (which was interesting because the image was flipped around :-) so, you might consider getting an eyepiece that flips things the right way around so that navigating terrestrial nature is easier to manage. 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. If you do not have your Hyperions yet I recommend you wait until you have these and try them out before you buy the Plossls. 2. None of my fancy EPs have enough contrast for this application. I also really liked my E-Lux 32mm, a Kellner. Just give yourself some time to learn the app and to understand the scope. You can email me also. You really understood the material. Why not go back to the people who sold you the scope and get their help. I would like to know what is best for a 7 year old that would be getting his first telescope. 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. Good quality. Pentax 10.5mm Eye Piece Excellent Condition (#314374986239) r***d (1910 . This is important to keep in mind because it means brands have to try really hard to one-up each other because the competition in a niche hobby such as astronomy can be fierce. Focal length telescope / focal length eyepiece = magnification or power. We also joined our local Astronomy Club and look forward to joining others under the night sky when the opportunity presents itself again. Once I knew how much I liked the zoom I upgraded to the Baader Hyperion Zoom. Overall, I would highly recommend the goldline eyepieces. I often had to drop back to about 180X because of poor seeing and transparency. Worth is a subjective evaluation, so here is my subjective input: 1. Plossl eyepieces have a wide FOV and are known for their clarity and sharpness. Read the full Earning Disclosure here. But the one I am recommending here is the Tele Vue Nagler series. With a 130mm-F5 I would use a Plossl 32mm for its low-mag-wide-view. 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. We have a range of 32 mm to 3 mm. In essence the design differences between Kellner and Plossl comes down to the number of lenses within the eyepiece barrel. The magnification range that is appropriate to your scope. The 4000 SWA's were way overpriced for their performance IMHO. Plossl eyepieces are very good and fairly inexpensive, typically between $25 and $50 each. So, I think it worth your while to try the Plssls. These eyepiecesproduce a 'standard apparent feld of view' of between 50 and 56 with most set at around 52. Your email address will not be published. (Compare, for instance, 20mm of each type, or 10mm of each type.) Lets illustrate with an example using a 1200 mm FL telescope. In most cases, these are eyepieces that are focused on wider AFOV or better correction for low focal ratio scopes. 6.5-ish mm (100x & 200x) They also have good eye relief, making them comfortable to use for extended periods. Well, I'll just say it. 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. You can build a full set of these with good results, but be aware of eye relief, especially if you wear glasses. There is a little bit more to it than that and there are other design . 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. The design uses a planoconvex, two cemented-element eye lens and a large convex field lens. Youll find yourself adjusting these type of factors less than. This can be debated 100 ways, but that is my advice. Our previous exchange convinced me to start out with an 80mm refractor. Sorry but I am not offering a configuration and pricing service. You will see these under many brands, including Orion, Celestron, GSO, and others. When you use a Barlow lens with an eyepiece, you get the magnification, but the eye relief is not affected. This was my first zoom eyepiece and the one that caused me to fall in love with zoom. Ive read, and re-read, and re-re-read this page. It also was considerably more expensive. By having a range of magnifications, you can optimize the image, which means you need more eyepieces. Those are significantly more expensive than the 1.25 focal lengths. Also, children do not often have highly developed motor skillsso I would avoid the frustration of switching out eyepieces, and consider a zoom lens. 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 purchased the Celestron Starsense 102mm refractor, focal length 660mm, stated highest useful magnification is 240x; it should arrive in about 2 weeks. 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. In the next section, we will talk about the AFOV of an eyepiece. Then you can judge for yourself if it is worth it. Sooooo helpful! 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. I consider the Plossl to be the minimum standard for a good eyepiece. Age is not part of the equation. And new proprietary designs come out from time to time. 2x Barlow It also gives the widest possible exit pupil in my dob and SCT, very handy when using nebula filters. If you want a very good eyepiece with a bit wider field of view but are on a budget, these are very good choices. A decent barlow might cost as much or even more. The only difference is that they have a different design as well as a shape with their lenses, which affects the magnification of your telescope view. They deliver sharp images in almost all telescopes. So we say that an F5 scope benefits from better corrected eyepieces more than the F10 scope. The Plossl eyepiece has 4 lenses, consisting of 2 identical double lenses. Scott. 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. I hope I can say that someday. The 66-degree AFOV of the Gold Line series provides a 32% wider field than Plossl eyepieces. The one exception I would keep in mind would be when working with Newtonian reflector telescopes below F5. Yes, Plossl eyepieces are some of the most popular with amateurs and professionals alike. Be aware of the focal ratio of your scope. If you wear glasses when observing, you probably want 15mm or more of eye relief, which the 20mm Plssl provides, but the shorter fl ones dont. Plssl eyepieces are good all-around performers, producing sharp images at the center of the field, but they have only four lens elements. 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. This gives us more flexibility at the low end of the magnification range. Im fairly picky so would extend budget for better eyepieces if its worth it. Some include: Parks Gold Series, Celestron Ultima's, Meade Series 4000 Super Plssls (depending on year / origin / style) and a few others that I don't remember. A 6mm Plossl has a tiny eye lens. Whether it is cars or telescope eyepieces, there are inexpensive ones, upgraded models, and very expensive ones. The BHZ 2 Adapter has threads on it so you can attach filters to it allowing you to use 2 filters with the zoom. Over $250, I will label premium eyepieces. As the clear cut worlds best eyepiece manufacturer, their name should at least be mentioned in an article like this. But are they really? If you just want a quick answer, skip to the conclusion at the end of the article. If you want to observe the fine details of a specimen, Plossl eyepiece has a higher magnification than an ocular with lower lenses. Astrophotography with Nikon D3200: Can It Be Better? With an f/10 telescope, Plossls are as sharp as any other kind of eyepiece of the same focal length. Using this 40 mm Plossl eyepiece is an excellent way to get a wide field of view with your telescope. Though not the Meade. Thinking in a super ploss 32mm and maybe something between 9mm and 15mm . If you want to buy him $200 eyepieces so he can grow into them, that works. Omni 9mm Eyepiece - 1.25" Learn More. AP is all about the mount and accurate tracking. 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. An exit pupil larger than 6 mm may start to show a shadow of the secondary mirror. 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. My own lineup (with a C8) is 32mm Plossl, 18.2mm DeLite, and 10.5mm Pentax (the last one not chosen to match, but rather because it belonged to a deceased friend). So I sincerely hope that this article helps you understand the similarities and differences between Plossl and Kellner eyepieces so that you can an informed decision and choose the best one for yourself. No results, please adjust your filters. https://telescopicwatch.com/best-barlow-lens-and-how-to/, Celestron 8-24 Zoom Review I also have an older smoothtop 20mm Meade 4000 that is also 5 element, and it is a fine eyepiece too, compared to another 20mm of the same vintage. Any exit pupil between 7 mm and .5 mm is just fine. The computerized pad and motor work on AA batteries which can last you a few hours. The Big Bang Optics participates in the Amazon Services LLC Associates Program, which is an affiliate advertising program designed to provide a means for websites to earn advertising fees by advertising and linking to amazon.com. With modern multi-coated optics that thwart internal reflections, Plossls and Kellners have little difference in glare or transmission/opacity. In general terms, the higher the AFOV number, the more the eyepiece will cost. When a beginner is choosing eyepieces on a budget, there are a number of possible designs they may choose between. https://telescopicwatch.com/orion-skyquest-xt8-intelliscope-review/. Most telescopes come with one or two eyepieces. In 1860, Georg Simon Plossl invented the Plossl eyepiece. It costs a lot to get that last 10% of performance. 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. This is why we recommend you try to locate the object first at low power, then use a higher magnification if you likethe wider field of view on the sky provides more context in terms of asterisms and reference stars and makes it more likely that youll catch the object you are looking for. Us big kids like zooms too. One of the main drawbacks of this eyepiece, though, is the eye relief. A key thing to remember is that eyepieces are universal. Since each eye has a different focal point, I suspect pulling the eyepiece out until reaching focus and then tightening the set screw. We can see that 2 eyepieces have an advantage over 1.25 eyepieces when designers are making wide-view eyepieces. We have compared Plossl against Kellner eyepieces in a previous article. This might contain more of what you need. The telescope comes with a 2x Barlow so I was thinking of getting one of the zooms you recommended. When discussing eyepieces, you will hear people comment on how well the eyepiece is corrected. All are good eyepieces and diagonals, and would be excellent for star party use. Thanks. 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. And you don't even have to get the full set if you don't want to. I still have it and still use it from time to time. I like my 38/70. The third choice of eyepieces is the Orion 12 mm Sirius Super Wide Angle Correct Image Eyepiece. Offered in both 2 and 1.25, these are excellent eyepieces. Some optics brands have taken the next step and launched some eyepieces they have labeled as Super Plossl. Once we are done, they will make sense. This is where the second formula comes into play. This determines how much light the telescope will gather. A very good quality eyepiece for a reasonable sum. The longer FL Plossls (>15mm) have some distinct advantages over more complex designs without the major disadvantage of Plossls which is short ER. I have a 4 element (traditional) and a 5 element 32mm Meade, both from the same era in Japan, and the 5 element is much better by quite a bit. It is as simple as that. These are often compared to the higher priced offerings. That's how cost-efficient the entire package is! I was looking on a OPT website and they have celestron 32mm and 15mm plossl. Videos for related products. Some of these series also offer 2 eyepieces for telescopes that can accept 2 eyepieces. Lets give an example. Each eyepiece gives you a unique magnification based on the formula listed at the start: Why do you need more than two eyepieces? You are looking through a LOT of atmosphere which distorts the image. But the longer FL units are certainly useful. I can recommend these with confidence. Or we say that F10 would be easier or less demanding on the eyepiece than the F5. 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. Kellner eyepieces were first designed by Carl Kellner in 1849. 130 mm scope will have a max of 260X for planning purposes. Rating (max 5): With a 8" dobsonian, a 6mm is very versatile. However, Orion has managed to make one that is quite compatible with most styles of telescope. The way a Plossl eyepiece works is by using the convex lens and concave lenses to create an image that has both total magnification of what youre viewing, as well as erect images. The Plossl optical design is very good for long and medium focal length eyepieces, delivering a sharp, flat field and an apochromatic image. If you don't like the reflections, there really aren't many other budget options at its focal length beside a Plossl which will be super uncomfortable to use, or spending over $100 for something like a Meade UWA. If you feel the need to buy something now, consider this Orion diagonal. 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. This would definitely matter to observers who wear eyglasses when viewing. We may earn commissions by recommending products on this website. Thanks for a very helpful guide. Also, atmospheric conditions can limit how much magnification you can use on a given night. Or, you may find that you like the 8 mm and 6 mm used with the Barlow and can avoid the expense of two eyepieces. Hi Ed, These are considered to be the least expensive eyepieces for serious astronomy and are offered in focal lengths from about 6mm to 40mm. 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! Later in the article, I will also give my top recommendations for both the best Kellner as well as the best Plossl eyepieces. If you are a glasses wearer and plan to keep your glasses on while you are observing, then you will likely want eyepieces with at least 17 mm of eye relief, and some glasses wearers prefer at least 20 mm. 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. Understanding and using a Barlow Lens