The Expanse is a lens that provides an extra sharp image, and it also has a wider field of view compared to the Plossl eyepiece. The views through it are very impressive, and it always amazes me when I get that one out. 1. 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. You have selected a very good starting telescope that will serve you for many years to come. is pretty forgiving of eyepiece faults and a wide variety of eyepiece designs will work just fine in it. When you use a Barlow lens with an eyepiece, you get the magnification, but the eye relief is not affected. Then set your maximum based on your aperture and split it up. If your telescopes focal length is different, just change the focal length in the formula. The big problem with Plssls is that the eye relief is about 0.75 times the focal length. I have not had an opportunity to test it yet but the general discussions have favorable. Finally, the worldwide pandemic has led to shortages and price jumps on many items. 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. It is as simple as that. FOR SALE! https://www.widescreen-centre.co.uk/explore-scientific-70-eyepieces.html. or a Baader Classic Ortho 18mm with both a 1.5/2x Barlow and 3x Barlow. If you are on a strict budget, this is a good choice as a zoom eyepiece. Whether it is cars or telescope eyepieces, there are inexpensive ones, upgraded models, and very expensive ones. Even if we were next-door neighbors this would take weeks of discussion and planning. Stargazinghelp.com 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 linking to Amazon.com. We have a range of 32 mm to 3 mm. But you may only be able to achieve that rarely. The TFOV will be as wide as your 40mm Plssl, but with greater magnification and a slightly darker sky background. This is your Lexus, Acura, and Infinity types that offer more features, better build, and a bit more polish. I already got the 10mm super wide because of the added eye relief but at 15mm both have the same eye relief. 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. Save my name, email, and website in this browser for the next time I comment. EP-mm = magnification = afov 4mm Eyepiece vs 20mm Eyepiece. Field of view, is about finding, framing, drift time, and context. I cant answer that specifically as I have no experience with that eyepiece in that scope. Optics manufacturers began selling and popularizing Plossl eyepieces, albeit with a generally simplified design where each achromatic doublet had the same focal length. These are exceptional eyepieces, and only available on the used market nowadays. Note that the full moon appears to be approximately .5 degrees across, so use that as a mental reference when looking at the numbers. And certainly, if you are getting into AP you are going to need that big budget. These eyepieces are technically called Symmetrics, since Plossls can have different focal lengths for each doublet, but they are always marketed as Plossl. I like my 38/70. If you upgrade the telescope or add a second one, the eyepieces will work on that telescope too. 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. Are there any good low-cost 2 EPS out there? Plossl vs Kellner Eyepieces: Which Is The Best? - The Big Bang Optics 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. Eye relief is the distance from the eye lens to your eyeball, and the higher the better (within reason). Even if the scope comes with the more acceptable Kelner or . I am very near-sighted, barely see the big E on the vision chart without glasses. Inexpensive Plossls that are manufactured using low-quality lenses are susceptible to internal reflections when viewing bright objects at high magnification. No, adapters are not needed but they may come in handy when you want to change the focal length or add other lenses such as filters or Barlow lenses. If you want to observe the fine details of a specimen, Plossl eyepiece has a higher magnification than an ocular with lower lenses. Now we can establish a target magnification range. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Since 2011, we've published astronomy related content and reviews to help guide the community better. I have personally tested a few Super Plossl and compared them to their regular counterparts by the same brand. We will now discuss the specifications of eye relief and apparent field of view. All of the Omni eyepieces have a 1.25" barrel size with the exception of the super low power 56 mm, which has a barrel size of 2". Thanks for your comment. The focal length range for 1.25 Plossls is about 6mm to 45mm. Be aware of the focal ratio of your scope. Why not go back to the people who sold you the scope and get their help. Now here is something that some of us classic scope nuts know - there are plossls, and there are plossls. I havent been into the hobby for long but my experience is in line with whats been said. Differences and Similarities. You can buy eyepieces specifically focused on a particular scope or you can buy eyepieces that you expect to use with this and all future scopes. There are some very good choices in this range. Again thank you very much for all the information in the page, excellent notes. You alluded to them, but you never mentioned Tele Vue. The ocular for your highest visual acuity - for viewing deep-sky objects and the like - should have an exit pupil around . What Is A Plossl Eyepiece?(Thoroughly Explained!) - Scope The Galaxy Another way to look at it is that a 30 mm eyepiece in a 3X Barlow works like a 10 mm eyepiece. I am looking for as much as best I can buy. In retrospect, I should have included Tele Vue. That can only be shown through actual testing. And the zoom provides every magnification in that range without having to change eyepieces. Dont worry about the math, as its simple stuff you can do with any calculator, on paper, or perhaps in your head. Omni 40mm Eyepiece - 1.25" Learn More. If you have a longer focal length telescope, your shortest focal length eyepiece will be a higher number than what I have shown here. Top 10 Best Best Plossl Eyepieces 2023 - Complete Buying Guide I often recommend it. I havent addressed .965 eyepieces in the recommendations. This will give you a maximum target for planning purposes. I really enjoy usingPlssls. Can You See The ISS With A Telescope? Even big telescopes are subject to limitations imposed by the atmosphere. ORION SIRIUS PLOSSL 10mm telescope eyepiece 1.25" - $17.01. The Baader offers wider fov, but at quite the price premium. Wide view and well-corrected view, even in F5 scopes. Eyepiece Field of View Simulator astronomy.tools Field of View Simulator Change Telescope Reset Change Target Add Equipment 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 longer FL Plossls (>15mm) have some distinct advantages over more complex designs without the major disadvantage of Plossls which is short ER. Because the eyepiece was still similar enough to a Plossl and still kept the symmetrical design, they called it Super Plossl. What diameter eyepieces will my telescope accept? Thanks, Angelo M. You picked a great first scope. Telescope Zoomable Eyepiece; Better or Worse Than Plossl 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. Note that we also gained a 16 mm magnification at no additional cost. However, i can read very well without my glasses with almost microscopic vision and can use my binoculars without glasses. 9 Best Eyepieces For Telescopes (Beginners Guide)(2023) SVBONY Eyepiece Review: Take Your Stargazing Up a Notch The difference in TFOV will be significant at this focal length. Now put the zoom on a 3X barlow and you have: Using the zoom approach with a Barlow your eyepiece set would consisit of a 32 mm low power eyepiece. 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. 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. 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. Orion SkyQuest XT8 Intelliscope Review short answer: yes. 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. Since it's such a popular eyepiece and allows for quality, planet-viewing, that makes it a great instrument for attracting newcomers to the hobby, especially children. This is where the cheap eyepiece will frequently fail to deliver a good image, around the edges. The Celestron Omni Plossl eyepiece range offers a nice entry-level range into the higher quality 4-element Plossl design. Quality this good usually costs a lot more. Just start with 32 mm for your low-power eyepiece. https://www.amazon.com/s?k=Orion+Q70&ref=nb_sb_noss_2, Understanding Telescope Eyepieces- There are recommendations, based on budget, ES 82 degree series plus 1 meade uwa @20 mm with 1800 focal length optical tube lowest mag 51 x / highest mag 300. 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. Im just starting out with astronomy and this really helped my understanding. 8.8 = 240 = .34 The 66-degree AFOV of the Gold Line series provides a 32% wider field than Plossl eyepieces. Do you think the Baader Hyperion Zoom would work OK with the Skywatcher 150p? 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 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. I agree. Higher than 3X is usually reserved for astrophotography. Besides fov, How would you compare the optical quality of the Celestron to the Baader? A decent barlow might cost as much or even more. You will get varying opinions on this but I would not worry too much about this. Good 32mm Plssls run around $30-$40. Orion Sirius Plossl 10mm telescope eyepiece 1.25" $17.01 SVBONY Telescope Eyepiece Set Telescope Accessory Kit with 2x Barlow L With a refractor, SCT or MCT, it is usually better to get a correct image diagonal than a correcting eyepiece. For it's cost, a 32mm Plssl eyepiece is hard to beat. 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 . Overall, I would highly recommend the goldline eyepieces. Another really helpful article, Ed. 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. On many occasions, that will be too high power for the atmospheric conditions. Or take one of your eyepieces and measure across the bottom of the barrel. What happens if you use an eyepiece that has a the wrong exit pupil? Or, if you are buying from an online like Amazon, then look at the eyepieces I recommend and see if any suit your needs. 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. As we go up in price range, we gain capabilities that may not be immediately obvious. Higher values are slower and lower values are fasterthis is a holdover from camera lens terminology and has to do with exposure times.). Vixen NPL Eyepieces | First Light Optics These are highly sought after ep's, and hold their value well. 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. My other eyepieces, ES and Meade 82 degree, stayed in the eyepiece case most of the time. As a result, this can cause aberrations in the image as you move from the center of the view toward the edges. Orion Sirius Plossl 1.25" eyepieces are ideal for all types of telescopes: reflector, refractor, and catadioptrics such as Maksutov-Cassegrains. They work great every day and get you where you want to go, but dont have what the higher priced models have. Do you need a 10 mm planetary and a 10 mm DSO eyepiece? Type above and press Enter to search. This can be especially helpful in telescopes of focal ratios below F8. 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. One of the main drawbacks of this eyepiece, though, is the eye relief. A Televue Plssl may be better than a generic one, but the difference is probably not worth the additional cost. Low focal ratio scopes deliver the light rays to the eyepiece at an ever-increasing angle as the focal ratio number goes down. These are considered to be the least expensive eyepieces for serious astronomy and are offered in focal lengths from about 6mm to 40mm. philhas Members 61 459 Location: North East England 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. I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. The BHZ 2 Adapter has threads on it so you can attach filters to it allowing you to use 2 filters with the zoom. Rating (max 5): 30 = 60 = 1.3 I would wait till you get the scope and use the included eyepieces. Again, it only costs $30 to $40 to find out, so the education is not that expensive. That's hard to beat IMO. What apparent field of view and eye relief do I want? Plossls provide very good eye relief for eyeglass wearers in focal lengths of about 25mm and longer. 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. Poorly chosen eyepiece might give you poor experience and sometimes even make stargazing difficult. I just ordered Hyperion 13mm and 21mm but I really like how sharp and crisp view is in plossl 40mm. How you divide up your magnification range is up to you. You can build a full set of these with good results, but be aware of eye relief, especially if you wear glasses. This is why many telescopes come standard with at least one Plossl eyepiece. But those EPs mentioned were all great too! It doesnt matter what type of telescope you have, as long as your scope takes these standard sizes. It comes with 1.25 Plossls 25mm (26x) and 10mm (66x) eyepieces. Finally, a wider field of view just makes it easier to find stuff. 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. Most telescopes come with one or two eyepieces, which gives you one or two magnification options. I possess an embarrassing array of fine eyepieces with names like Ethos and Nagler and Delos. Those are significantly more expensive than the 1.25 focal lengths. The Plossl is a good all-around eyepiece design, is well suited for generic use and is relatively inexpensive to make. 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 .