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. Both will provide the same magnification. I wants to install one in house(fixed place) another I need movable. 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. I think I will go for the BHZ because, as you say, I will be able to use it now and into the future. that I could slide into my telescope and look at. No surprise there. From planetary viewing to deep sky watching. I am not aware of any such solutions for Newtonian reflectors. Recall that your lowestpower eyepiece's exit pupil should not exceed 6mm. 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. 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. In the beginning, you are not going to know what the atmospheric conditions might be in your area. This series of eyepieces may provide better value in this price range. It also gives the widest possible exit pupil in my dob and SCT, very handy when using nebula filters. You have a very wide choice of brands and styles to choose from. You will see these under many brands, including Orion, Celestron, GSO, and others. 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. Despite this, I also have some Plossls which are indispensable. It is all about your budget, your goals, and your objectives, as outlined in the article. You can accomplish a longer eye relief by barlowing a longer f/l plossl, so that is something to think about as well. Eye Relief: This refers to how close your eye has to be to the lens in order to see the full field of view. 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. 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. If you just want a quick answer, skip to the conclusion at the end of the article. If you do upgrade, youll probably want to go for a different eyepiece design than a Plosslsomething with a sharper image or a wider field of view or a longer eye relief (or all three.). The views through it are very impressive, and it always amazes me when I get that one out. . Was $38.99 - $99.99 Now $31.19 - $84.99 Compare Orion Edge-On Planetary 1.25" Eyepieces These come in focal lengths from 2.3 mm to 25 mm. We enjoy binoculars for the moon, but having never looked through another telescope, my kids and I do not know what internal reflection, ghosting, vignettes, or diffraction spikes look like! Plossl eyepieces have 4 lenses that are paired in two doublets. Hi - I bought these from another AM'er 1 year or so back, thinking I will get into visual astro, But never found the inclination, So here it is for sale 9mm Nagler type 6 mint with box and caps,16mm Nagler type 5,optics are exc. Some optics brands have taken the next step and launched some eyepieces they have labeled as Super Plossl. The design uses a planoconvex, two cemented-element eye lens and a large convex field lens. They are usable, but your eye will be extremely close to the top lens glass. Another way to look at it is that a 30 mm eyepiece in a 3X Barlow works like a 10 mm eyepiece. When I was getting my start in the hobby, I bought an ultra-cheap ($15?) 130 mm scope will have a max of 260X for planning purposes. 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. Plossl eyepieces have a wider field of view that can go from 50 to 56 degrees. Plossl telescope eyepieces are the most popular type of eyepiece on the market. Comparing to Plossl, the Expanse eyepiece is a lot more expensive. So its best for use during duller times when there isnt much brightness visible. You are looking through a LOT of atmosphere which distorts the image. I would expect it to be similar to the Celestron in image quality. Differences and Similarities. 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. Sorry but I am not offering a configuration and pricing service. Any 1.25 diagonal should work. 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. Something in the 30 to 38 mm range with a 65 to 70 degree AFOV. Overall, I would highly recommend the goldline eyepieces. 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. . 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. (Focal ratio is a term that refers to the telescopes focal length divided by its aperture. Which is Stronger? 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. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. In simple terms, high focal ratio scopes, say those over F6, tend to be less demanding on eyepieces than those below F6. 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. 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. 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. But dont fear that you will waste your investment as eyepieces are standard sizes. Even if we were next-door neighbors this would take weeks of discussion and planning. 6.7 = 268 = .3 https://www.amazon.com/Explore-Scientific-68%C2%B0-40mm-Eyepiece/dp/B007LMG3F6/ref=sr_1_1?dchild=1&keywords=explore+scientific+68&qid=1606584676&sr=8-1, Thanks for your reply, I think I will go for the Orion Q70 . 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. 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. That is why I suggest, if you can use 2 eyepieces, you will want one or two low power wide view 2 eyepieces. The stock 9 and 15mm Omnis were very good. Lower power almost always looks better than higher power. 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. I have the 38 mm and recommend it often. Lets look at the minimum. People may have heard, and rightly so, that Huygens or Ramsdens are crummy eyepieces and that they should get a Plossl instead, and they may believe the same applies to Kellners, but the truth is that Kellners are often good eyepieces. The image will be reversed left to right so you will need to get used to that. That is a wonderful expression. Tele Vue offers several series with apparent fields of view from 50 degrees to 120 degrees. Plossl eyepieces have wider fields of view than Kellners. 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. Offered in both 2 and 1.25, these are excellent eyepieces. Their 50 to 52 degree AFOV is wide enough for general observing. Centuries of improvements led to achromatic refractors, where the primary lens is made up of two lenses of different types of glass, which reduces false color fringing and allows the telescope to be made considerably more compact. However, I have eyepieces that have larger exit pupils than 7 mm and they work well. They are referring to how much or how little distortion is visible as you look from the center of the image out toward the edge. What focal length eyepieces should I buy? They are all made by the same OEM manufacturer. Celestron 2026 Erecting Prism Barlow Lens Set is another great choice for those looking to get a variety of magnifications. 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. Required fields are marked *. 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. They have a narrow AFOV but have a reputation for being very sharp.. These "other" ones I speak of, aren't technically that, they are a 5 element eyepiece, of a different design. 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. did i pass? However, if you want to optimize your viewing experience, youll need to invest in a better-quality eyepiece. Our previous exchange convinced me to start out with an 80mm refractor. Thanks, Angelo M. You picked a great first scope. The availability of good quality relatively wide field-of-view inexpensive eyepieces has kind of put them in the second tier of eyepieces, but they still hold their own in the longer focal lengths and excel if one does not demand a wide field-of-view. Very often, those eyepieces will be in the outdated 0.965 format rather than the modern 1.25 or 2 diameter barrel format. Find many great new & used options and get the best deals for Meade 32mm 2" 5-element Super Plossl Wide Field Eyepiece at the best online prices at eBay! If money is not a concern, you cant go wrong with Tele Vue eyepieces, any Tele Vue eyepieces. Where a difference can show up is that a lower number focal ratio scope will make it harder for an eyepiece to provide a uniformly good, in-focus image all the way across the field of view due to the steeper angle that the light arrives at the edges of the eyepiece with a low focal ratio scope, as compared to a high focal ratio scope. 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. I dont dabble in AP. I purchased the Celestron Starsense 102mm refractor, focal length 660mm, stated highest useful magnification is 240x; it should arrive in about 2 weeks. It will also make your life easier if youre out observing on windy days that would otherwise blow off the front cover of your telescope. 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. I beleive this is the same as they ones you asked about. 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. A Plossl eyepiece lens provides more eye relief than anything else out there! But some people demand the very best, and it is available, at a price. Under my sky it was rare that I would be able to get over 225X and still maintain a good quality image, except on the Moon. 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. Each eyepiece gives you a unique magnification based on the formula listed at the start: Why do you need more than two eyepieces? Every review suggests replacing the 10mm Kellner eyepiece (and possibly 25mm Kellner) that comes with it. But the difference in price to get to the next level is high, and the performance difference may be small. My most used eyepiece is an 8-24 mm zoom. Or, if you are buying from an online like Amazon, then look at the eyepieces I recommend and see if any suit your needs. Orion 12 mm Sirius Super Wide Angle Correct Image Eyepiece has a rubber eyecup that holds in light, which enables you to enjoy this powerful telescope eyepiece at night without glare or reflections from any external sources. The focal length range for 1.25 Plossls is about 6mm to 45mm. philhas Members 61 459 Location: North East England This eyepiece was even better at correcting false color fringing, but because of internal reflections, the glare was even worse. Focal length telescope / focal length eyepiece = magnification or power. Higher than 3X is usually reserved for astrophotography. 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. - 32mm plossl. For super Plossl eyepiece, the field of view is typically 40 to 60 degrees. The only reason it's in this list because of its price and a long focal point. 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. It also produces an erect image, meaning you see what youre viewing rather than seeing everything upside down or sideways as some types do.
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