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". 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. Does having a 70 vs 52 fov make a noticeable difference for double the price? However, there can be a problem bringing the eyepiece into focus. 8.5-ish mm (75x & 150x) But in this scope, the 32 mm doesnt work well. What follows are specific eyepieces that I have tried, own, or have read so many good reports about that I feel very comfortable recommending them. 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. Second? The third choice of eyepieces is the Orion 12 mm Sirius Super Wide Angle Correct Image Eyepiece. Good quality plossl eyepieces - Discussions - Stargazers Lounge 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. The field of view of a p Plossl eyepiece is typically 60 to 120 degrees. 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? Can you give me any specific recommendations on what to buy and from where? The view being presented to your eye in a low power eyepiece minimizes everything from optical aberrations in the telescope, to distortions from thermals or atmospheric conditions. Prices can run from $20 to $200 so the field is pretty broad. Any exit pupil between 7 mm and .5 mm is just fine. Orion Sirius Plossl 1.25" Telescope Eyepieces Note that we also gained a 16 mm magnification at no additional cost. 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. It comes with 1.25 Plossls 25mm (26x) and 10mm (66x) eyepieces. I have just one Meade product currently and that is a series 4000 1.25 inch UHC type filter which I use for outreach. You will see these under many brands, including Orion, Celestron, GSO, and others. They are all 4-element Plossl eyepieces, and most have a 52-degree field of view that is common to the Plossl design. As we go along, I will refer back to these, so dont worry if you cant answer the questions or understand the formulas now. At 32mm, a Plssl will give you as wide a field of view as any 1.25mm eyepiece can. I owned an XT8 Intelliscope which is the same optical tube on a PushTo mount. I wont go into all the types of aberrations that can be there. With a 8" dobsonian, a 6mm is very versatile. What Is a Plossl Eyepiece - Planet Seekers 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 email address will not be published. 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. They have a narrow AFOV but have a reputation for being very sharp.. Worth is a subjective evaluation, so here is my subjective input: 1. Meade 32mm 2" 5-element Super Plossl Wide Field Eyepiece Aspheric and Plossl Plossl are both lens designs that can be used in most telescopes. As said, they are cheap to compare. The TFOV of the Hyperion will be greater than the TFOV of the Plssl, but the magnification will be about the same. 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. 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. 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. It has made learning the Constellations and star-hopping more fun and engaging for my whole family exactly what I was hoping for. or a Baader Classic Ortho 18mm with both a 1.5/2x Barlow and 3x Barlow. New and used eyepieces + 2 diagonals - Updated At this point, a Plossl and a Kellner are so close in price and performance that you may as well get the Plossl. You see the object in a wider expanse of space with more stars. Every review suggests replacing the 10mm Kellner eyepiece (and possibly 25mm Kellner) that comes with it. But dont fear that you will waste your investment as eyepieces are standard sizes. So, basically a Plossl eyepiece is a type of eyepiece that enables the viewer to see a wider field of view than would normally be the case, but at the cost of him/her having to physically put his eye very close to the lens of the eyepiece. Find many great new & used options and get the best deals for Meade telescope maksutov eyepiece ETX-105EC Super Plossl 6.4mm 1.25" w capsule at the best online prices at eBay! Sony A7III vs A7RIII Astrophotography: Which One to Shoot Infinity! Kellner and Plossl- both are two different types of eyepieces for telescopes. Are there any good low-cost 2 EPS out there? Just give yourself some time to learn the app and to understand the scope. I still use my 30mm Celestron Ultima fairly often with some of my telescopes. These "other" ones I speak of, aren't technically that, they are a 5 element eyepiece, of a different design. The eye relief is the distance between your eyes and the eyepiece where you are able to view the whole image comfortably. Rating (max 5): (often referred to as Pseudo Masuyama). . . To achieve a maximum of 200X (2X the aperture of 100 mm), we solve for the focal length. There are inexpensive adapters that will let you use standard 1.25 eyepieces in a .965 focuser/diagonal. Plossl eyepieces have wider fields of view than Kellners. 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. Poorly chosen eyepiece might give you poor experience and sometimes even make stargazing difficult. Best suited for telescopes with f-ratios f6 or slower. 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. 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? The ES is actually slightly cheaper than the Orion but my understanding from your reviews and replies is that ES might actually be the better eyepiece have I got that right? I would suggest you also get a 2 low power wide view. It comes with two Barlow lenses, one Newtonian eyepiece, and three Plossl eyepieces in the set. Omni 40mm Eyepiece - 1.25" Learn More. 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. https://www.amazon.com/s?k=Orion+Q70&ref=nb_sb_noss_2, Understanding Telescope Eyepieces- There are recommendations, based on budget, There is one aspect in which a Kellner can actually outperform a Plossl: eye relief. Though not the Meade. Stargazing Help is a participant in Amazon Associates program. philhas Members 61 459 Location: North East England Jupiter and Saturn are low in the sky now. If your focuser/diagonal only accepts 1.25 eyepieces, I would recommend you use a 32mm as your longest focal length, lowest power eyepiece. If you go this route, you can always add single focal length eyepieces along the way to serve specialized purposes. 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. What apparent field of view and eye relief do I want? I also struggled to see features on both (gas bands on Jupiter and clear rings on saturn). Let us know in the comments if there is anything else you want to ask or share your thoughts on this post, always looking forward to feedback from others who will benefit from it as well! now it all makes sense, you did a great job explaining all this information it was a lot to take in but i have it now. What Is A Barlow Lens For A Telescope? Despite the narrow field of view and short eye relief, it showed shockingly good views of Saturn, Jupiter, and even the Moon. None of my fancy EPs have enough contrast for this application. They have good center sharpness but exhibit some field curvature and astigmatism. These are considered to be the least expensive eyepieces for serious astronomy and are offered in focal lengths from about 6mm to 40mm. But just because an eyepiece is 2 doesnt mean it has a wider field of view than one that is 1.25. A Plssl is probably as good as any 32mm eyepiece in a 1.25 inch focuser. Lets give an example. 2x Barlow If you stumble the first few uses, dont be discouraged. The stock 9 and 15mm Omnis were very good. These lenses are connected together. These eyepieces are technically called Symmetrics, since Plossls can have different focal lengths for each doublet, but they are always marketed as Plossl. It costs a lot to get that last 10% of performance. If you have a longer focal length telescope, your shortest focal length eyepiece will be a higher number than what I have shown here. When you use a Barlow lens with an eyepiece, you get the magnification, but the eye relief is not affected. I like my 38/70. 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. It appears to be a custom-made 90 degree binocular built from two 90 degree diagonals and binocular-size objectives attached in place of the usual OTA. Lets illustrate with an example using a 1200 mm FL telescope. If you just want a quick answer, skip to the conclusion at the end of the article. 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. Typically a Barlow does not add or subtract from this, but there again we have bad Barlows and Good Barlows. Here we have very good eyepieces with some extra features. This makes them a bit more complex and expensive than other designs, but also gives them a wider field of view, reasonable eye relief, and reduces optic aberrations. 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. 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. Are Plossl eyepieces any good? This determines how much light the telescope will gather. Do I need an adapter if my scope has a Plossl lens? - 32mm plossl. 1. The 4000 SWA's were way overpriced for their performance IMHO. This means less time trying to figure out which way your images should be oriented before examining them. While it covers the same range as the Celestron zoom, it offers better optics, better mechanical operation, and a wider field of view. Plossl eyepieces have an eye relief equal to about 80% of their focal length. Orion Sirius Plossl 10mm telescope eyepiece 1.25" in very good to excellent 185794462395 That is up to you and your budget. I had one and sold it. Us big kids like zooms too. And certainly, if you are getting into AP you are going to need that big budget. Come join the newest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors. I once had to use a 6mm Plossl to attempt to perform a star-test collimation for a telescope at the observatory. 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. I have personally tested a few Super Plossl and compared them to their regular counterparts by the same brand. I still have it and still use it from time to time. Now we have a maximum established. A four-element eyepiece was made by putting together two achromatic doublets with different focal lengths. It offers good color correction and high-contrast images. (Focal ratio is a term that refers to the telescopes focal length divided by its aperture. Excellent, thank you for the breakdown, very much appreciated. The price ranges we show here are the typical prices. 30 = 60 = 1.3 However, your budget must guide your purchases. The ES 82s are my favorite eyepieces, especially in the 1.25 format. 11 = 163 = .5 I do not miss beating my eyelashes against a 9.7mm Meade Plossl that I used to own. How will my telescopes focal ratio affect my purchases? What's the difference between two Plssl eyepieces? I already got the 10mm super wide because of the added eye relief but at 15mm both have the same eye relief. My friend has one and he really likes it, and it is his third telescope. If you are just testing the waters or on a tight budget, get the Celestron, which is still pretty good. Thanks for your comment. I believe the 5000 UWA's are good as well. 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. 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. 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. If we combine a Barlow with an 8-24 mm zoom eyepiece, we have an amazing range. This is a good thing, because normally the shorter the focal length of the eyepiece, the less eye relief you have. Interesting points Philip. 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 . That's hard to beat IMO. . Omni 32mm Eyepiece - 1.25" Learn More. This means you will be able to see a greater expanse for the objects in space but with fewer magnification levels than Kellner or Plossl lenses. This design features 4 lenses that are paired in two close-set doublets for the eye lens and the field lens. So you ended up with: 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.
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