I would like to know what is best for a 7 year old that would be getting his first telescope. the reality is that today's eyepieces are all quite good, particulalarly in an f/10 telescope. I must say Im quite confused about eyepieces. Orion Sirius Plossl eyepieces are ideal for any type of telescope; refractor, reflector, or catadioptic. In the next section, we will talk about the AFOV of an eyepiece. The Big Bang Optics was started because of our love for astronomy and to help others like us find the best telescope and accessories. This is the link to the one I plan to buy as I know some others come with add ons: https://www.rothervalleyoptics.co.uk/baader-hyperion-mark-iv-8-24mm-universal-zoom-eyepiece.html, Thats great you had an XT8i that makes me feel confident I got a good telescope . When I was getting my start in the hobby, I bought an ultra-cheap ($15?) However, some eyepieces have an eye relief as short as 5 mm. 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 . 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. Then you can judge for yourself if it is worth it. Type above and press Enter to search. 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. . That said, I should also tell you that not all Plossls are created equal. Can you help me. One more thing if you havent purchased a telescope yet, I would recommend a tabletop version, since they are easier for kids to move than the fiddley ones with spindly legs and complicated dials. So your 600 mm example (f/6) becomes, in effect, an 1800 mm focal length, f/18 but it does not change the focal length of the eyepiece. Unless you are a professional astronomer or extremely demanding, you can select your eyepieces based on magnification, the apparent field of view, eye relief, and price. This has nothing to do with your scope or eyepiece. 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. Is there much of a difference between the celestron and haader? So, I think it worth your while to try the Plssls. 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. . Its quite long but that is what we are aiming for and hopefully, it was useful to you. Differences and Similarities. 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? Your eyepieces do not need to be the same brand as your telescope. I have not had an opportunity to test it yet but the general discussions have favorable. I have a custom-built 32mm Plossl that has been opened up as wide as possible to 60 or 70 degrees, for use as a 2 eyepiece, although in my 10 Dobsonian at f/5 the edge distortions prevent it from seeing much use. I've got a one-off plossl like that in my kit that I'll probably never sell, (aside from my 5 element ones) and it's one that is rarely seen. condition as described, a good transaction. Finally, a wider field of view just makes it easier to find stuff. My Baader Hyperion Zoom is my most used and favorite eyepiece. It may very well last you a lifetime and in the long term, you will definitely consider it to be a worthwhile investment. 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. But are they really? There was an old Meade Super-Plossl design that used an additional lens element and could reach a wider field of view. 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. The field of view of a p Plossl eyepiece is typically 60 to 120 degrees. Here's the short answer - Plossl eyepieces are generally better than Kellner eyepieces, but they also tend to be more expensive. 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. It is pretty much worth it for everyone that has a telescope with a 1.25 inch focuser to have a 32mm Plssl. Choose three focal lengths. In my scopes a simple zoom eyepiece like the Celestron 24-8mm or the Baader has replaced the higher powered plossls. I tested out my BH zoom yesterday for the first time and it is a great eyepiece so thank you for the recommendation! But I have one little niggle. These have the advantage that the front section with the optics can be unthreaded and threaded on to the filter threads of a 1.25 inch eyepiece. Kellner eyepieces work perfectly with small and medium-sized telescopes. Lets illustrate with an example using a 1200 mm FL telescope. I want these as possible as wide, magnification and astrophotography purpose. In some cases, the eyepieces are waterproof to protect them from internal contamination caused by heavy dew conditions. So, for your 30 mm, 82/60 = 1.36 degrees. To estimate the highest practical magnification for your telescope, you take the aperture in millimeters, mm, and multiply it by two. Recall that your lowestpower eyepiece's exit pupil should not exceed 6mm. Because some objects look better at low power, some at medium power, some at high power, and some at very high power. They are also really sharp. I also really liked my E-Lux 32mm, a Kellner. In 1849, Carl Kellner invented the Kellner eyepiece, which is essentially a Ramsden eyepiece where one lens has been replaced with an achromatic doublet made of two different types of glass. Offering a wide 43 apparent field of view, this 40mm Orion Sirius Plossl Telescope Eyepiece provides extremely sharp images of impressively high contrast. There is no shortage of accessories for the Nexstar series. This can be especially helpful in telescopes of focal ratios below F8. In retrospect, I should have included Tele Vue. did i pass? Or is this overkill and am I better off saving money and going forward something like the Celestron Zoom? You can still get eyepieces, but there are few choices. i still use the binos. 4mm Eyepiece vs 20mm Eyepiece. No other type can compare with it when it comes to that quality. If the above guide has helped you understand the terms and workings of eyepieces, scroll up and make a selection from our recommendation list. Omni 56mm Eyepiece - 2" Learn More. 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. 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. I can recommend these with confidence. 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. 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. 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. They are all made by the same OEM manufacturer. that I could slide into my telescope and look at. . Celestron - 1.25" Eyepiece and Filter Accessory Kit - 14 Piece Telescope Accessory Set - Plossl Telescope Eyepiece - Barlow Lens - Colored Filters - Moon Filter - Sturdy Metal Carry Case. I couldnt find any suggestions on your site about diagonal recommendations. 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. Even if the scope comes with the more acceptable Kelner or . The sharp/crisp view you get from your 40mm Plossl comes down to the relatively low magnification it provides. I cannot thank you enough! The big problem with Plssls is that the eye relief is about 0.75 times the focal length. Sometimes you want to see a wider field of view to locate an astronomical object like a nebula by using nearby stars. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. The 5-lens-element pseudo-Masuyamas that telesonic mentioned are/were fine eyepieces. Oh the pain of uh having access to really cool eyepieces.). Free shipping for many products! So you would have to test the set to see the actual result. Just start with 32 mm for your low-power eyepiece. no caps come in bolt case. Gold line eyepieces are available in 6mm, 9mm, 15mm, and 20mm focal lengths. Orion Sirius Plossl 10mm telescope eyepiece 1.25" in very good to excellent 185794462395 These are just a few examples of eyepieces that I have used, and some that I own. At shorter focal lengths they have less eye relief, and at all focal lengths they have a narrower field of view, than newer types. You can build a full set of these with good results, but be aware of eye relief, especially if you wear glasses. The 4000 SWA's were way overpriced for their performance IMHO. The components of a Plossl eyepiece are the two groups of lenses. Focal length telescope / focal length eyepiece = magnification or power. You can do the calculation which will show that the 70 will have a significantly wider field of view as compared to the 52. The Japan made 16mm Meade 3000 was a very nice medium power plossl and the 40mm in that series was surprisingly nice as well. Comparing to Plossl, the Expanse eyepiece is a lot more expensive. 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. The quality of a Plossl eyepiece completely depends on the brand and model, so be very careful in our selection. Very nice article. Omni 40mm Eyepiece - 1.25" Learn More. This four-element Plssl design is the most popular eyepiece optical design that gives you excellent image quality, good eye relief, and a 50 to 56 degrees apparent field of view. Pay attention to the eye relief, especially if you will be observing with glasses. Very often, those eyepieces will be in the outdated 0.965 format rather than the modern 1.25 or 2 diameter barrel format. But the one I am recommending here is the Tele Vue Nagler series. In stargazing, eyepieces are as important as telescopes are. 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? 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! Meade telescope maksutov eyepiece ETX-105EC Super Plossl 6.4mm 1.25" w capsule. Most likely it will be used as a loaner eyepiece to go with one of my two loaner telescopes. You use the 8-24 zoom for the midrange. As we go along, I will refer back to these, so dont worry if you cant answer the questions or understand the formulas now. very happy. But with 2 eyepieces and a Barlow, you have the full effective range of your telescope. My 20, 26, and 32mm Plossls will probably stay around. To achieve a maximum of 200X (2X the aperture of 100 mm), we solve for the focal length. In this case, I am going to define this by the focuser and eyepiece size. Here we get into the BMW, Cadillac, Porsche, and Ferrari of eyepieces. . Worth it is a tough question to answer. A zoom eyepiece works like the zoom lens on a camera. 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. Your email address will not be published. A Televue Plssl may be better than a generic one, but the difference is probably not worth the additional cost. If we want to get VERY specific to a combination then inherent aberrations of this scope and that eyepiece could produce a unique result. Plossl eyepieces are perfect for astronomical viewing because the field of view is wider. Hi, I have recently bought a Orion XT8 and am trying to work out which eyepieces to add to what is provided with the scope. This is a good thing, because normally the shorter the focal length of the eyepiece, the less eye relief you have. Since each eye has a different focal point, I suspect pulling the eyepiece out until reaching focus and then tightening the set screw. From planetary viewing to deep sky watching. Some of these series also offer 2 eyepieces for telescopes that can accept 2 eyepieces. This series of eyepieces may provide better value in this price range. We have compared Plossl against Kellner eyepieces in a previous article. Pentax K-70 Astrophotography: The Ultimate Camera on a Budget! I often recommend it. Remember that visual and AP have very different requirements, so plan on at least two different optical tubes. I hope I can say that someday. There is the 56mm Meade Plossl which magically turns my short FL refractors into their own finder scopes. I have owned wider eyepieces, but ultimately I just prefer the Plssls (must be a mental defect). Tele Vue offers several series with apparent fields of view from 50 degrees to 120 degrees. Achromatic vs Apochromatic refracting telescopes. That's how cost-efficient the entire package is! The larger barrel allows them to create an eyepiece with a higher AFOV. It includes two high-magnification Plossl eyepieces and five lower magnification zoom oculars with an adjustable focus in the kit. 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. Good evening everybody. 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 are just testing the waters or on a tight budget, get the Celestron, which is still pretty good. Every review suggests replacing the 10mm Kellner eyepiece (and possibly 25mm Kellner) that comes with it. One of the TMB Planetary eyepieces are extremely nice for 50. Lenses are fully multi-coated for excellent light transmission and reduced internal reflections. The price can run to over $1000 per eyepiece. This number can range from 30 degrees to 120 degrees. Other eyepieces of more advanced design can have better eye relief and field of view. 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. Correct image diagonals are easier for beginners and they are great for using the scope during the day, but experience people dont use them for astronomy. You are looking through a LOT of atmosphere which distorts the image. Now here is something that some of us classic scope nuts know - there are plossls, and there are plossls. On many occasions, that will be too high power for the atmospheric conditions. I dont dabble in AP. 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. The stock 9 and 15mm Omnis were very good. Excellent article, thank you very much for taking the time to publish it. 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. Im also uncertain about what to expect from an additional investment? If your focuser/diagonal only accepts 1.25 eyepieces, I would recommend you use a 32mm as your longest focal length, lowest power eyepiece. Plossl eyepieces are often included in better telescope packages as the starter eyepieces. But what are the other differences? Here we have very good eyepieces with some extra features. And you don't even have to get the full set if you don't want to. At least you'll have one budget eyepiece that will give you a larger part of the sky at low magnification. To achieve these benefits, they may use special glass and more costly manufacturing. Even though both eyepieces are very common in beginner telescopes, it has become harder to find Kellner eyepieces on their own in the last two years, whether they come from a brand name or the original equipment manufacturer or a reseller. Omni 6mm Eyepiece - 1.25" Learn More. I think you will love it! Again, I only do this for my low power wide views. 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. Though not the Meade. All the rest will likely be 1.25. (Focal ratio is a term that refers to the telescopes focal length divided by its aperture. We often end up spending more on eyepieces than we did on the telescope. This can be very helpful for star hopping. However, some lateral color error is apparent when looking at bright subjects, such as Jupiter or Venus, against a dark sky. . https://telescopicwatch.com/best-astrophotography-telescopes/. 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. Hi Ed, I believe the 5000 UWA's are good as well. With your glasses on, you simply cant get your eye close enough to an eyepiece that only has 10 mm of eye relief. A Plossl eyepiece has a field of view thats very wide, so if youre looking at the full moon or some other object in space with it, chances are youll see the entire thing. Personally I think they're still worth it. If you were considering a Meade Super Plossl, in that case just get the regular one also by Meade. 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. 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. Then there is the rule of thumb to avoid duplicating focal lengths when acquiring eyepieces. It also produces an erect image, meaning you see what youre viewing rather than seeing everything upside down or sideways as some types do. Plossl eyepieces are great. Choosing the most appropriate can completely change your experience in using telescopes. If you are investing for the future, get the BH zoom. 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. 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. SVBONY Direct . It allows each eyepiece to provide two magnifications. With a refractor, SCT or MCT, it is usually better to get a correct image diagonal than a correcting eyepiece. i dont have 1 of everything, and i bought the best i could afford on a low budget; meade and orion. 1:10 . 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 . Apparent Field of View: This is a measure of how wide a view the eyepiece will provide as compared to alternate eyepieces. 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. That is a wonderful expression. For our experience level, would you recommend changing anything right now? A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. 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. SVBONY Telescope Eyepiece Set Telescope Accessory Kit with 2x Barlow Lens 4 Element Plossl Design 6.3mm 32mm 40mm for Astronomical Telescopes. . That's hard to beat IMO. You have selected a very good starting telescope that will serve you for many years to come. A standard Plossl eyepiece is typically between 20mm to 25mm but can range anywhere from 15mm up to about 40mm in diameter.
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