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- เผยแพร่เมื่อ 14 ก.ย. 2021
- Thinking of stepping into the realm of hyperwide 100° telescope eyepieces? Look no further for all the need to know info on both the TeleVue Ethos and Explore Scientific 100°!
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Enjoyed the review. Have yet to purchase upgraded eyepieces, but these are two brands I’m leaning towards. Appreciate the information .. Sub’d!
Glad you found it useful. That's for the sub!👌
Very good review! Lots of good information, Thanks a lot.
Glad you found it helpful. Thanks for the feedback, I appreciate it👍
Ive recently started looking at the sky at night with a Skymax 150, i know very little about eyepieces, i really value your information, most people on here are always trying to sell you something, thanks.
Glad to hear the nice feedback. I appreciate it👍
Whew, quite a stable of EP's and a Tak to put them in? You my friend are very blessed to have such views, I'm sure they are amazing. I own one Ethos (13mm) but have had the 17 and the 10 at one point. Have even done my own shootout with the ES 14mm but kept the Ethos as I got a great deal on it and the views were indeed superior and more comfortable as well as the Tele Vue being lighter. I also use Nagler, Delos, Pano and other ES eyepieces.
Thanks for your take on the comparison👍 what scope are you using? Sounds like your fairly into visual like me.
@@AVTAstro Indeed I am a visual junkie, there's something about seeing the photons live that astrophotography doesn't do for me. I'm also a push-to guy which is why I love those hyper-wide field EP's, always felt it was better to learn the sky over using a motorized/go-to scope. I observe with a 10" dob (f/5 basic overseas made solid tube) with a Paracorr and also with an ES ED102 on a UniStar Deluxe mount. The 10" is the dob I've kept (best optics) after going through a few 8"s another 10" and a 12". Aperture fever is real. The ES is a *very* nice scope especially for the price being a triplet, but it doesn't hold a candle to Fluorite equipped Takahashi's. Along with the 13 Ethos I use 26 Nagler Type 5, 22 Panoptic, 14-10-6 Delos set, as well as a couple of ES 82's (11, 6) kicking around.
Another informative video, so thanks, Vlad. Personally, being mainly a refractor guy, I've never found the need to justify going above the cost of Televue Nagler eyepieces and, then, only one or two of them. The majority of my premium quality eyepieces are Televue Panoptics, Televue Radians and Brandon Flat Tops. All other things being equal, I prefer having more eye relief over a wider apparent field of view.
thanks for the feedback👍 Yeah comfort factor is very important. Like I have said in a lot of my videos in a way I prefer the 68* eyepieces as they are just so easy to use to thier full potential as far as the FOV. The 100* really make you work at seeing that entire FOV.
Hey Vlad, love your vids. To address your ES100* eyecup comment- I use the eyecup in the up position, keeps me at the perfect distance, and most importantly keeps my head located in the right spot for the exit pupil. I had an eyecup fatigue and break off on my 14mm 100*, and I hated it! Haha Another thing for anybody interested in the 100* ep's, is that you kind of have to turn your head to look around in the eyepiece, not move your eye in your eyesocket. You have to move your head and essentially pivot around the point in space where your pupil is. If you move just your eye, your pupil moves out of the exit pupil of the ep and it may black out. For me, the 100* ep's aren't "really" for using the whole field, but more so that it feels like sticking your head into outer space than looking through a window. I have the ES 30mm 82*, 20mm 100*, 14mm 100*, 2x barlow, and 4.7mm 82* used with a 10 inch f4.7 dob.
To clarify, I mean the eyecup keeps my head still and located for a good view, like left/right/up/down, not just distance from lense. The eyecup just slightly touching my brow stabilizes my head and gives me a reference for position. No miniscule movements from balancing, breathing, etc.
Yeah I know some people prefer to do that. I'm an advocate of seeing the entire FOV all at once. It's what I paid the big bucks for!!!🤣🤣🤣🤣
I completely agree about turning the eyecup down using 100 degree it makes the experience much more immersive and enjoyable (and kind of what you pay more for). Many people have some initial hesitancy getting real close to the eyepiece but then have that WOW moment when they do. Not sure if it’s the coatings televue uses but I find the views a little brighter than other brands even using the same focal length. Enjoy your videos a ton. Cheers and clear skies from Massachusetts.
Glad to hear from another eyecup down fan! Thanks!
I understand the reason for being water proof is because of *heavy dew* , which makes sense, plus after bring the EPs inside where condensation can form. The argon gas hopefully will not allow mold to live as well. Two good reasons in my book to seriously consider the ES eyepieces. Nice review...especially about ER and what to expect to see in the big boy eyepieces we are blessed with these days...I know because I grew up in the 70s and my first EPs had a big H on them...lol
Thanks!
With all those high-end eyepieces and that Takahashi refractor in the background, there is a major amount of money on that table. Congratulations.
I suppose there is. But even if it is a decent amount of money it's also money well spent as the gear will last a lifetime if cared for.
I've had a few 100 degrees over the years of both brands. Honestly I just can't use these types to their full potential. I have very long eyelashes and I need a bit of eye relief. Also, I'm someone that likes to see the field stop (people sometimes think that's weird). For me 82 degree is the max, and I actually prefer 68 degree eyepieces. The good news is they are often lighter weight also. So I think I'm done with 100 degree. Currently my only 82 is a type 1 nagler 7mm. My main wide fields are 34mm 68 Meade (without the shroud), 24mm Panoptic, and 16mm 68 ES, Nagler type 1 7mm. I'm a big fan of simple light eyepieces for solar and planets.
I do agree that the 68* are the most comfortable to use👍
Thank you for your wisdom
Glad it was helpful 👍
Awesome vid! I have a tele vue and explore scientific and both kick ass. I do have a question…both of these eyepieces are very expensive and was wondering what you thought of the Meade 100 AFOV eyepieces. I bought a 21mm and 15mm for the price of one of these. I took them out last night was very pleased. In your opinion, how much quality did I lose? I have an LX90 10” it’s an F10.
I have not used the newer Meade's. But in reality if you are happy with them I'm sure they are a fine eyepiece👍
Since your scope has a slow focal ratio (f/10), it's very forgiving on eyepieces that may not be the most well-corrected. Eyepieces that perform well and stay corrected in fast scopes (f/5 and under) is where Tele Vue excels. That's one of the cool things about owning a long focus refractor or Cassegrain is that you don't need to shell out for the best eyepieces since your scope does not produce a very steep light cone. If you ever get a rich field refractor or big dob (needs coma corrector for best image) you'll notice the difference between the Meade and the Tele Vue.
Those reflections were helpful comparison
Glad it was👍
The trouble with not using the cup deployed is that, as your eye gets closer to enjoy that wonderful field of view, your eyelashes...well......lash the top lens surface, leaving body oils and acids on that coated surface. It's not a good idea.
It can be true. Really depends on the person. I have never had an issue with it, and there is no way your eyelashes or whatever they may leave on the lens will damage it.
Nice review. Imo, the wider fov ep's are for people with manual mounts because it makes finding objects so much easier. Folks with goto mounts don't really need the super wide fields of view. I only have two EPs the televue nagler type5 31mm 82deg fov and the Explore Scientific 9mm 120deg fov. I got the ES at a huge discount that I couldn't pass up. I find the same optical artifacts in both EPs. Its just that in the ES the artifacts are bigger and more noticeable and that's likely due to the higher magnification rather than design,materials differences. I admit that the televue seems to consistently give me clearer images. On the most part the ES gives me clear images; however, for some reason I haven't yet figured out Saturn seems to cast a haze around itself that drowns out its moons, but only Saturn. Everything else is a clear view including Jupiter.
They are certainly useful for manual scopes. A lot of people(myself included) do also enjoy the wider view on tracking scopes. 👍
Really interesting. AM I right to think that a 31mm Nagler give better contrast than the 21mm Ethos on a 12 inch F5 dob? I've got my eye on an Explore Scientific truss dob and would like a once in a lifetime/treat of a wide field eyepiece to go with it. It also sounds like the Nagler would be easier/more comfortable to use, is that right?
Comfort wise yes I think most will find the 31mm Nagler easier to use. Contrast wise I think they will be a tie with the 21mm Ethos possibly pulling ahead due to the higher power it produces in the same scope.
Very interesting! Thank you! Do you know, if the Naglers T5 and T6 are as well corected on very fast dobsonian scopes with Paracorr as these?
Yes the Naglers are about as well corrected and excellent eyepieces.
@@AVTAstro
Great! Thanks!
I'd be interested to see how some other 100° eyepieces stack up, like lunt or stellarvue or the astro tech ones coming out. A 25mm at 100° sounds awesome
Unfortunately I have not tried the others yet. If the companies want to send them to me for evaluation Id be happy to do the comparison ;)
@@AVTAstro well have to petition Mike at astronomics to send a few out lol. Tho I think eventually, I'll end up with televues, slowly but surely. But I'd be nice to have something in the mean time... Do you think the ethos with 100° is really a better experience than say naglers?
@@jimpoop ethos vs naglers are mostly a choice between 82 and 100 deg afov, Imo, folks with goto scopes have little use for 100 deg afov's. folks like me with manual mounts benefit from the extra afov. The extra fov makes is so much easier to find objects particularly in the shorter focal length eyepieces.
I've used all three brands in the 100 range. In my F4.4 scope, the stellarvue optimus line is FANTASTIC, with a coma corrector. I once returned the ES 20mm- did not plan to, but it is the dud of the line, and can't even compare to the 21 ethos. TV is simply the best, and nothing else considered, anyone should go with them for 100 EP's. I was able to buy the 20, 13.5 and 9mm stellarvue EP's used at a great price (36% of new comparable ethos)to give them a try, and they (again with the corrector for the 13.5 and 20) are equal to TV in field flatness, contrast, and light transmission. Greatly exceeded expectations!! But let me keep it real- my galaxy KILLER is my TV DELOS 6mm- the best EP in my kit!! Great review and thanks.
I recently bought the 100° ES 9mm, a beloved astronomy club member died and his widow was selling his telescope collection to the club members only. She only wanted $100, but it was brand new and I gave her $200 (it's on sale now for $299, Jan,2024) and wished I had more cash at the moment to buy more eyepieces. I bought it at the right time because a club member came in said he'd take them all and added a $1000 to the total (he is also in charge of the club's loaner library so I think I'll get to use them anyway).
That 9mm in my f/7 102mm triplet will be great for splitting quadruple systems at high magnification and keeping all the system in view. How I will use it is in combination with my 2" 19mm 82° Luminos at 37x and then install a 2.5x apo 2" Barlow at 94x and see how it looks. Then I can pop in the 9mm with its 100° fov at 198x and see what I can see. The AZ-Pro is quite accurate once leveled and I have calibrated levels. That little bubble level on the side of the mount is level, but it looks level even when it is off a little.
Very cool, thanks for the helping out the lady. Enjoy the eyepiece, the 100* ES is what I use as my primary eyepieces!
@@AVTAstro Glad to hear Vlad. I used it last night on the Moon at 79x it filled the whole view. Seeing was excellent and the Terminator shadows were sharp.
I just got my first telescope ( 14" F/4.6 dobsonian). I bought a used Tele Vue Delos 4.5mm and I ordered a brand new ES 11mm 82°. What would you recommend in terms of medium magnification (17mm-24mm) and low magnification (24mm-30mm) eyepiece ?
Thank you!
I'd presonaly just stick to the Explore Scientific 82* if you like your 11mm. That or Televue Naglers. Hope this helps.
I think the eyecup is intentionally larger than the eye relief so you can put your face in and block stray light from the side.
That may be. Issue is that you introduce vibration.
Hi Vlad, I've got an NP101is, and want to push towards and perhaps past its 250x max recommended power. The nearest I could have got would have been with TV's Nagler 2.5mm, which would have given me 216x, but it's discontinued. I then found the Vixen HR 1.6mm and 2mm, which would have given me 338x and 270x, but yeah, again discontinued. I'd rather not get there with a Powermate, but no one wants me to have a high powered eyepiece anymore!!! Do you know if anyone's making something similar, and how far would you push a 540/f5.4? Many thanks...
Hey Kevin, I do not know any current eyepieces shorter then 3mm. While the NP-101 might be able to get you to 250x I think you will find that the image will be too dim. I personally would not push a 4" scope above 200x as the image just gets too dim for me.
Thanks Vlad, I'll take your advice and target 200x. Unfortunately Uncle Al doesn't have an eyepiece that will get me to 200x either, so my only option would be my 6mm and a 2x Powermate, that would get me to 180x. Can you suggest an eyepiece only option that would get me to 200x? Many thanks...
Personally I woukd do the 2-4 or 3-6mm Nagler zoom. That way you can adjust the power to the seeing conditions on the perticular night.
What rings are you using here for your TSA-120?
Hi, that's actually a TSA-102. Rings where William Optics I believe.
Nikon NAV HW 102 is tops. Nice video.
Never tried one, hope to some day.
No 13e vs 14 es100 comparison?
I can say the 14 holds its own extremely well against the 13e.
The 20 was another story however, but the brand that makes the orion xwa and all those other ones really knocked it out of the oark
I like the 2inch eye pies !!!
Who does not??? LOL. Yes 2" EP's are awesome!
A phone call or email to Tony and Liz can clear up many unknown things about the Brandon eyepieces.
Brandons are in a unique place in the market place.
With my slower 6 inch F/15 refractor the Brandons have out performed most every eyepiece I have tried.
However this is on planets and double stars mostly.
Also consider your F/Ratio of your scope.
ES and TV make great eyepieces no question however most people do not have a good enough telescope to see those differences.
Thomas Back made some great
TMB Planetary eyepieces using different glass that had been used before in eyepieces.
Lots of reading out there.
Before anybody says hear say about
Thomas Back I personally talked with him by phone many times before he passed away and his insight into optics was. very special indeed as was he himself.
Tony and Liz at Vernonscope are another great asset to the Astronomy world as was Don when he was running things.
In closing what is your F/ratio on your scope?
What exit pupil and Gov are you trying to frame your object of interest in your scope.
Exit pupil is not discussed enough.
Great review and really liked seeing the
scale showing weight of these heavy eyepieces.
I have a few ES 82 deg fov and they do well in my 6 inch F/15 refractor and my
8 inch F/9 refractor.
However when I need the last photon to make it through my smaller aperture scopes the Brandons do the best followed by my older TMB Planetary
a very close after the TMB’s is the
RKE Kellners with only 3 pieces of glass in them. Keep in mine this is with my F/ratio scopes.
Enjoy the viewing out under the stars as often as you can.
I have scopes that are f/4.5 to f/9 and have used these eyepieces in them all. But very cool that you had a chance to speak to Thomas Back! It's amazing how many of his lens designs are still being produced by APM.
Swimming in the Ocean, with the Explorer Scientifice eyepiece, Lol 😂. Nailed it, Buddy 😅👍.
Dude, come on now! You know when you go on a tropical vacation you gotta bring your 100* eyepieces with you!!! Cant leave them in the hotel room all alone when going for a dip in the ocean🤣🤣🤣
@@AVTAstro Rofl, 😂😅👍
I suspect it is like Toyota vs Honda or Canon vs Nikon. You cannot go wrong with either line. I am on team TeleVue, but would likely be just as happy with ES.
Pretty much. They are both great in slower scopes. TeleVue is better towards the edge in faster scopes.
Would a paracorr help with the edge performance gap?
Yes it helpf a lot in faster dobs.
@@AVTAstro Then could this mean that a paracorr'ed Explore Scientific 100 and a paracorr'ed Etho have similar edge performance on a faster dob? Wonder if you've tried this. Thanks in advance!
Scott Roberts with Explore Scientific once said that there exist what is referred to as "perfect coatings". They are coatings that are perfectly clear. He said that he use to work for a company that coated a line of optics ( I assume Meade) but they had to stop using them because people complained that there were not coatings. I suspect that Brandon uses perfect coatings on their eyepieces but claim not to use any coatings at all.
That's interesting. Have not looked into it, bit it would be cool if true. In reality the less reflective a coating makes the lens the better no mater what they look like. Glass that uncoated is pretty reflective because of the very high polish.
@@AVTAstro Scott has a zoom podcast several days a week that you can find on his youtube channel. That is where I heard him say it. Other than that I am not familiar with it either.
Scott Roberts is partially correct. The colorless coatings are multilayer broadband designs that provide low reflectance across the visible spectrum from 400 nm to 700 nm. The average single surface reflectance of these coatings is about 0.2 to 0.3 %R. These coatings are often brownish in color, whereas uncoated glass is entirely neutral in color. What is noticeably different is the reflected luminance or brightness of the reflected light between uncoated glass and a broadband AR coating. If you view the eyepiece from above with the black cap over the field lens, a broadband coating will look much darker than the narrower band blue-purple and red-purple multilayer AR coatings. Most AR coatings today have a noticeable green reflectance which is detrimental if the maximum reflectance of the green peak is greater than 0.8 %R. Beware of bright green AR coatings. Recall that the eye’s greatest sensitivity to light occurs at about 550 nm. Ideally, you want minimum reflectance at this wavelength. Single-layer AR MgF2 coatings are usually pale blue. These V-shaped coatings reduce single surface reflectance to a narrow range of wavelengths to a minimum of 1.4 %R. For comparison, uncoated glass is 4.25 %R for a single surface.
Спасибо за обзор !
Glad to help!
realy not easy To select a "perfect" eyepiece with a "medium" focal ratio telescope. i think around F6 is the worst focal for that. I'm Not so glad of that
The 20mm ES is only $100 cheaper than the Ethos 21mm. Scott has lost his mind!
Yeah like I said in the video, these days the ES are kind of a hard sell....
Money money money…MONEY! Can you name that tune?
I thing it's called money???🤣🤣🤣
@@AVTAstro …..MONEY! You may be older than I think 💭 congratulations, you’re the next contestant on, Name That Tune. Your prize will be; TeleView Zoom 6-30 that has just been released to destroy the competition. Your prize is worth $3000! And coming in at only 5 pounds.😂
Ted dibiase
Not any eyepiece just overpriced ones......
You sir are right. They are overpriced, but you get what you pay for. If you want the best, you gotta pay for it. I think we can agree that this applies to just about anything in life👍
@@AVTAstro I don't buy them....I have a Meade UWA 20mm, 21mm Panoptic, some very old 82 fov University Optics eyepieces.
@@dankahraman354 But there is no 21mm Panoptic. lol.