A typical zoom eyepiece has a focal length range of 8 mm to 24 mm. It sounds cool, they must be better than regular Plossls with that name, right? However, for your extra money you get the finest manufacture, the best polish and coatings available. Sometimes you want to see a wider field of view to locate an astronomical object like a nebula by using nearby stars. The price ranges we show here are the typical prices. 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. If you stumble the first few uses, dont be discouraged. Plossl eyepieces have wider fields of view than Kellners. In the case of the Celestron, you get all the focal lengths from 24 to 8mm in one eyepiece that costs $100. After these, we have mostly proprietary designs from various eyepiece companies. I usually recommend a 32 mm Plossl type eyepiece as that provides about the widest view you can achieve with a 1.25 focuser. Note that the price categories are approximate, as prices can vary between retailers. dnrmilspec is right. Orion Q70 38 mm works well. A long eye relief is also important for those who wear eyeglasses at the eyepiece, whether thats a member of the general public at a star party or an astronomer with astigmatism, which, unlike near- or far-sightedness, cannot be corrected with the telescopes own focuser. As of the past couple years, it seems possible that the choice between Kellners and Plossls has been made for usyou either get what you get with your beginner telescope, or you will have to find a Plossl. Quality this good usually costs a lot more. Omni 56mm Eyepiece - 2" Learn More. 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. Are there any good low-cost 2 EPS out there? It offers good color correction and high-contrast images. I had a bino pair of TV 20mm Plossls, very fine for high power planetary observation with my long focus 8" Mak, then I also bought the older TV 21mm Plossl, after trying the 21mm I sold the more recent 20mm. The 66-degree AFOV of the Gold Line series provides a 32% wider field than Plossl eyepieces. So if you need to go to Arcturus and then go 2 degrees to the right to find your target, you can use the FOV of the eyepiece to estimate 2 degrees. What happens if you use an eyepiece that has a the wrong exit pupil? My other eyepieces, ES and Meade 82 degree, stayed in the eyepiece case most of the time. But will the Baader CO with 1.5-2-3x Barlows deliver a visibly sharper and more contrast view of the Moon and planets than the zoom lens with a 2x Barlow, to compensate for the zooms convenience that is the question! I am very interested in viewing Nebulae do you think this set up will work well for that or do I need other eyepieces or filters? Save my name, email, and website in this browser for the next time I comment. Even though there are more sophisticated types of EPs, Plossls hit the right spot between high-quality optics and price. Am I correct? Again, this is more noticeable in lower focal ratio scopes. The 26 and 32 are usually the first ones I reach for. But what are the differences between these two and how do you know which one to choose? My friend has one and he really likes it, and it is his third telescope. I did sell them all when I adopted Dioptrx, and the Naglers are amazing! 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. very happy. Was $38.99 - $99.99 Now $31.19 - $84.99 Compare Orion Edge-On Planetary 1.25" Eyepieces Do you need to have the best to enjoy astronomy? Thanks. 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. Other brands have joined and have used the Super Plossl label, but they all keep the original 4-piece design. Ive read reviews about my scope. All the rest will likely be 1.25. I want these as possible as wide, magnification and astrophotography purpose. But some people demand the very best, and it is available, at a price. Plossl eyepieces are great. But are they really? This can be debated 100 ways, but that is my advice. Also worth mentioning i wear glasses which I will wear while observing. Gosky Plossl 40 mm Telescope Eyepiece - 1.25inch This is probably the worst eyepiece I can recommend. Not everything in the sky benefits from high magnification. I have the 38 mm and recommend it often. > Click here to jump to the Best Eyepieces section. If you want to observe the fine details of a specimen, Plossl eyepiece has a higher magnification than an ocular with lower lenses. It has made learning the Constellations and star-hopping more fun and engaging for my whole family exactly what I was hoping for. This is where the second formula comes into play. Its quite long but that is what we are aiming for and hopefully, it was useful to you. I often recommend 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. How does that field of view impact the viewing experience? About Us | Privacy Policy | ContactLittle Astronomy 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. This is the link to the eyepiece I am looking at potentially buying, would you recommend this over the Orion one or vice versa do you think? Offered in both 2 and 1.25, these are excellent eyepieces. In my opinion, there are no wrong exit pupils. I have several 10mm eyepieces in my eyepiece boxalmost all of them are eyepieces that came with some telescope I boughtand I will almost always choose to use one of the Kellners over one of the Plossls, because the Kellners have a longer eye relief, which is comparable to the focal length. 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 think I will go for the BHZ because, as you say, I will be able to use it now and into the future. 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. 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. While I also have the Baader Hyperion Zoom, mentioned later, I continue to make use of the Celestron, especially in my smaller scopes. or a Baader Classic Ortho 18mm with both a 1.5/2x Barlow and 3x Barlow. The big problem with Plssls is that the eye relief is about 0.75 times the focal length. Videos for related products. The ocular for your highest visual acuity - for viewing deep-sky objects and the like - should have an exit pupil around . SV207 30mm Super Plossl Eyepiece. High-quality Plssl eyepieces provide high contrast and sharpness across the entire field of view. Perhaps you should seek out help from your local astronomy club. Other eyepieces of more advanced design can have better eye relief and field of view. Look at the apparent field of view specs and understand what this means for the field of view. I just added the 4.7 mm. There is always more to learn but it helps if you go in with a good base understanding, and that was my goal. Plossl eyepiece is one of the reasonable options when it comes to telescope eyepieces for stargazing or astronomy. 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. Now you can get good eyepieces for under or around $50. This general purpose design gives good colour correction and an adequate feld of view at reasonable cost and they are often bundled with new telescopes. I have seen elsewhere discussions about the exit pupil of eyepieces. 130 mm scope will have a max of 260X for planning purposes. That is why I suggest, if you can use 2 eyepieces, you will want one or two low power wide view 2 eyepieces. 20 = 90 = .8 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. Looking forward to first use. OK that makes sense, many thanks. This means less time trying to figure out which way your images should be oriented before examining them. For astronomical observations, such as viewing craters on the moons surface from Earth, high-magnification models are preferred because they offer more detail. This type of design provides for both total magnifications as well as an erect image with little distortion. Hi Ed, that is really helpful sorry if this is a daft question but is the baader hyperion 2 or 1.25 or can it be both? 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. It comes with 1.25 Plossls 25mm (26x) and 10mm (66x) 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. eyepiece shows signs of use with caps and bolt case, 32 mm Plossl very good cond. Any 1.25 eyepiece will work with the BH Zoom 2 adapter. A decent barlow might cost as much or even more. 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. The quality of a Plossl eyepiece completely depends on the brand and model, so be very careful in our selection. It also gives the widest possible exit pupil in my dob and SCT, very handy when using nebula filters. There is the 56mm Meade Plossl which magically turns my short FL refractors into their own finder scopes. 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 SVBONY eyepiece review should get you up to speed with the budget stargazing options. Fully coated optics provide crisp and bright views of the cosmos. These are the workhorse eyepieces of today. 4mm Eyepiece vs 20mm Eyepiece. I cannot thank you enough! Another useful aspect of a wider field of view is that, assuming the entire eyepiece is sharp enough to show good images right to the edge, you dont have to nudge the telescope to track the rotation of the Earth as often with a Plossl (50 degrees) compared to a Kellner (40 degrees). The downside to this type of lens is that they can cause chromatic aberration which creates colored spots around bright objects such as planets or stars due to the different wavelengths not going through equally.