Home / scientific / explore scientific 20mm 68 degree review Explore Scientific 20Mm 68 Degree Review 05/09/2021 Having fairly a few of the ES 82 EPs, I bought the 20mm/68 to fill in a focal length gap in my repertoire. This one has actually discovered a home in my 6" SCT. The 68 level in this certain scope offers 75x through .91 area of view and a 2.00 leave pupil. It has excellent comparison and is sensibly sharp through 15.3 eye relief. It appears to be the perfect enhance for my 6" and has actually been a permanent fixture in this SCT for over a year.You watching: Explore scientific 20mm 68 degree reviewIn my other scopes it is a good performer. I have actually considered purchasing a second one considering that I generally have more than one scope out at a time.#3csrlice12 csrlice12ISSPosts: 28,693 Joined: 22 May 2012Posted 23 December 2016 - 09:47 AMIts flast throughout the field in a f4.7 dob then a 20XW is...pretty nice eyepiece all at once. Its among my still in the kit eyepieces.#4Jon Isaacs Jon IsaacsISSPosts: 94,298 Joined: 16 Jun 2004Posted 23 December 2016 - 10:30 AMIm getting this EP Saturday. Any thoughts on exactly how it performs?ThanksNick:I have just looked with the 20mm ES 68 degree, never before owned one. I have actually a lot of endure with it"s close cousins, the 16mm and 24mm mm Meade SWAs...Everything I recognize, whatever I have actually watched, it"s a fantastic eyeitem. It more than likely isn"t rather a perfect as the 19mm Panoptic yet it"s cshed enough that it does not matter.Jon#5rowdy388 rowdy388SkylabPosts: 4,382 Joined: 09 Apr 2013Posted 23 December 2016 - 10:41 AMI prefer my ES 20 68 so a lot I just bought the ES 16 68 in the present sale.#6sickfish sickfishCosmosPosts: 9,588 Joined: 13 Jan 2009Posted 23 December 2016 - 10:44 AMHave one.Good EP.You will favor it.#7russell23 russell23Voyager 1Posts: 12,112 Joined: 31 May 2009Posted 23 December 2016 - 11:18 AMIt is one of the ideal eyepieces I have actually supplied for lunar monitorings. Better edge performance than the 20XW through comfortable eye relief. The 19mm Pan has a tiny cleaner sky background. #8gunfighter48 gunfighter48ApolloPosts: 1,131 Joined: 18 Mar 2013Posted 23 December 2016 - 11:46 AMI use my ES 20mm 68° eyeitem a lot in my LS8 SCT for searching DSOs. I really prefer it for that purpose. Has sufficient magnification and also FOV so some of the fainter DSOs can be located and then I have the right to pick an extra suitable eyeitem for detailed examine.#9rguasto rguastoApolloPosts: 1,287 Joined: 18 Nov 2010Posted 23 December 2016 - 11:57 AMI have one for 4 years. It"s incredibly cshed in magnification to others I very own and is rather redundant yet I cannot carry myself to market it. This is a very good eyepiece IMHO. When you take right into account the price, it"s a wonderful eyeitem. -RobEdited by rguasto, 23 December 2016 - 11:57 AM.#10tomykay12 tomykay12Surveyor 1Posts: 1,949 Joined: 22 Apr 2012Posted 23 December 2016 - 12:21 PMAn excellent eyeitem that is often supplied right here in several various kinds of scopes; a 10" dob, 100ed, 6" f/5 reflector, and also a brief tube 80. It was initially purchased in addition to it"s 24mm cousin for use in an 8" sct, wright here it also excelled. Fear not; you made an excellent alternative.See more: Oregon Scientific Bar388Hga Manual Oregon Scientific Bar388Hga (English#11gezak22 gezak22GeminiPosts: 3,401 Joined: 15 Aug 2004Posted 23 December 2016 - 03:41 PMMine proved astigmatism, even as soon as the Dioptrx was installed. Given the positive comments here, mine was possibly just a bad sample.#12Jon Isaacs Jon IsaacsISSPosts: 94,298 Joined: 16 Jun 2004Posted 24 December 2016 - 05:42 AMMine showed astigmatism, even when the Dioptrx was installed. Given the positive comments right here, mine was maybe simply a bad sample.On-axis astigmatism or off-axis astigmatism?What scope and also exactly how a lot astigmatism carry out you have? A thought: Apparently you have sufficient astigmatism to need the Dioptrix, did observers without astigmatism check out it in the eyepiece?Jon#13nickcodybarrett nickcodybarrettVanguardtopic starterPosts: 2,012 Joined: 17 Apr 2016Posted 24 December 2016 - 11:19 AMWell im getting it tonight! I"ve had clear skies and great conditions this entirety week, hopetotally this does not curse it. Im utilizing it in my 8" dob.#14gezak22 gezak22GeminiPosts: 3,401 Joined: 15 Aug 2004Posted 24 December 2016 - 12:15 PMMine proved astigmatism, even once the Dioptrx was mounted. Given the positive comments right here, mine was possibly simply a negative sample.On-axis astigmatism or off-axis astigmatism?What scope and how a lot astigmatism do you have? A thought: Apparently you have enough astigmatism to need the Dioptrix, did observers without astigmatism view it in the eyepiece?JonOff axis, in a Televue 101 f/5.4. Other observers didn"t look through my scope.I have actually a CYL worth of 0.5, so I bought the corresponding Dioptrx for the 31mm Nagler. I tried it on the 20mm simply to watch if the astigmatism was mostly because of my eye or because of the EP. With the Dioptrx mounted, tright here was still some residual astigmatism. It was not objectionable, but I expected even more from a 68 level EP.No massive deal, the 17mm Nagler serves me well, so I marketed the 20mm.#15REC RECVoyager 1Posts: 12,197 Joined: 20 Oct 2010Posted 24 December 2016 - 03:09 PMI have the Meade variation and also it is a very comfortable EP to use. Gives me a nice 2mm departure pupil for 100x in my 8" SCT.#16nickcodybarrett nickcodybarrettVanguardtopic starterPosts: 2,012 Joined: 17 Apr 2016Posted 24 December 2016 - 11:58 PMFirst light was good. No coma at all. Stars were pinsuggest all the means to the edge of area. The wide area was good. Im not supplied to wide field views. This is an excellent dso EP.#17tomykay12 tomykay12Surveyor 1Posts: 1,949 Joined: 22 Apr 2012Posted 25 December 2016 - 01:09 AMyep#18Jon Isaacs Jon IsaacsISSPosts: 94,298 Joined: 16 Jun 2004Posted 25 December 2016 - 06:04 AMOff axis, in a Televue 101 f/5.4. Other observers didn"t look through my scope.I have a CYL worth of 0.5, so I bought the matching Dioptrx for the 31mm Nagler. I tried it on the 20mm just to view if the astigmatism was mainly because of my eye or due to the EP. With the Dioptrx mounted, tright here was still some residual astigmatism. It was not objectionable, yet I meant even more from a 68 degree EP.I would not argue with that, in my NP-101, I see some slight residual astigmatism in both the 24mm and 16mm Meade"s which supposedly have actually the exact same optics. But there are incredibly few telescopes that are perfect enough in their own off-axis correction to watch that astigmatism and you are comparing it to a legendary eyepiece, the 31mm Nagler. The NP-101 and the TV-101 are about the toughest tbelow is on eyepieces bereason they are quick and they are complimentary of aberrations of their own. I don"t think you had actually a bad sample, it"s a question of expectations. It"s not perfect-perfect however it"s plenty good sufficient and method better than just about anything else available that doesn"t say TeleVue somewbelow.This was my initial comment:"Everything I know, every little thing I have actually seen,it"s a great eyepiece. It most likely isn"t quite a perfect as the 19mm Panoptic but it"s close sufficient that it does not issue."For a 15 year old choose Neil, it"s a fine eyeitem.. And also, for me, I am happy with the 24mm and also 16mm versions, a small astigmatism. what"s the massive deal?