What Difference Does Replacing Your Stock 25mm Telescope Eyepiece Make?
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- čas přidán 4. 09. 2024
- In this video I conducted an experiment using real humans. We find out if Will and Steve, who have little to no astronomy experience, could tell the difference between a budget, mid-range and top-end eyepiece in the 25mm widefield range.
At the end of the episode you'll find out if I've decided to buy the TeleVue Panoptic that's on loan from a friend of mine.
NB: a TeleVue Dioptrx attachment will not correct for shortsightedness or long-sightedness, only for astigmatism. The eye-relief with a Dioptrx attachment fitted reduces even further.
There is no need to correct for near and far sightedness, that is what the focuser of the telescope is for.
The dioptrix will correct for your astigmatism and focusing the telescope will do the rest
Narrow field of view with Plössls? My first eyepieces were Hughens and Kelners of the 1970s with apparent fields that turned viewing into the experience of looking through a narrow copper pipe :-) Was lucky to replace these with TeleVue Plössls, Naglers, Panoptics and Wide Fields, which are all brilliant…
I like Kelners
one thing to consider with a plossl, is that a good one can have brightness, contrast, and sharpness equal to high end eyepieces at the cost of FOV, which might not matter depending on your target. 25mm down to 15mm plossls are also very easy to view through.
Yes, good points. I revisited the 25mm plössl last night on the upgraded mirror diagonal and it is very sharp and pleasant in the centre. I'd recommend upgrading the star diagonal early. Worth the money and might give that plössl some extra use.
I had a 27mm Panoptic and I still own a X-Cel LX 25mm. The X-Cel LX shows true star colors while I didn't find that with the Panoptic, although the Pan had a slightly flatter field at the edge. Bang for buck is wonderful with the X-Cel LX line.
Barsta planetary ED like Agena Starguider/Astrotech Paradigm are really the best bang for the buck for 60° AFOV.
The X Cell LX 25mm is the worst in the range.
The 25mm plausssuhl that comes with those scopes is probably the best plossl out there, short of japanese made premium/vintage plossls
Very entertaining video - well done (great editing and humor). The wide field grows on you quickly - it's almost shocking when you go back to a tiny FOV Plossl. I personally have sold almost all of my Tele Vue's and replaced them with 82 degree Explore Scientifics. Same effect, just much cheaper. I haven't ventured past 82 degrees because the price goes into orbit quickly.
Thanks, glad you enjoyed it! Yet to try ES EPs. Have recently fallen in love with Baader Morpheus series. Not quite the 82 degrees you're at but close. Optical quality is right up there for me. Loving visual!
"We become what we think about" 😂😂😂 omfg dude I nearly fell off my chair
None of it is planned, it just happens.
@@AstrocandyTV came to learn about astro, stayed for the impromptu jokes.
Really useful video as well as entertaining!
Glad it was helpful!
If you get a chance, you should do this test on a 8 to 12 inch f5 reflector.
I agree! Trying to get an 8 inch dob to do that.
25mm Plössl isn't really good for anything in standard focal length Dobsons:
It's too narrow to fit in wide targets like Andromeda Galaxy+its satellites, Pleiades etc , or workd as good "finder" eyepiece.
And it totally lacks magnification for non-wide targets.
30mm/little short 2" wide view eyepiece is what you want for them. GSO made Dobsons are actually far better equipped than brand overhyped Celestons/Orions and SkyWatchers (made by Synta) and come with starter level 2" wide view eyepiece.
@@AstrocandyTV Get GSO made Dobson. In UK that's StellaLyra of FirstLightOptics.
It comes with £250 worth better accerssories than brand overhyped Celestrons, Orions or SkyWatchers.
Though as f/5.9 8" Dobsons aren't as heavily demanding as 10" and larger for how well corrected aberrations of the eyepieces are.
If you ever go for the horse head, you'll need a smaller fov to keep alnitak outside the fov. It's also useful for many other DSOs.
Stellar view, eyepieces are as good as any and better than most. The price is fantastic for the quality, they are second to none.
many thanks for vid, I love wide apparent field! it explained lot to me !
Great to hear!
my favorite eyepiece is the televue panoptic 35mm. thats the one I use at star parties for folks who have never looked through a decent, non high end, dobsonian telescope and my SCTs.
Why are Ausists looking at Vega? It must be quite low in the sky.
The Eyepieces are far to be perfect. In fact the humain eye is doing a lot to fix the image given from them. Therefore what it is about should be to choose the best eyepiece according the telescope which has also optical defects.
Nice work! Can’t find anything you said is wrong.
The ExCelLX is a fantastic eyepiece in my Edge 8/Skywatcher 6 classic dob. I bought that along with Astro-Tech sky-guider/Paradigm 12mm. Anyone looking for the best bang for buck I recommend those two. A great starter set.
I have a TV 32mm Plossl and TV 13mm Nagler-6 that are fantastic quality lifetime eyepieces I do 90% of my viewing with. Panoptic 24s are rare as hens teeth so I’ll pick one of those up when they send out the next shipments!
Thanks, George!
Barsta (or short BST) Starguider ED sold also as Agena Starguider ED, Astrotech Paradigm ED, Artesky Super ED, Tecnosky Planetary ED and TS-Optics ED are usually lot better bang for the buck than normally big brand extra in price having Celestron X-Cel LC...
Whose price is basically too high for the 60° AFOV, because you can get 82° AFOV UWAs for around 100 $/€.
Hey Lowblow ;) Even though I'm not into astronomy in particular, I've been watching videos of yours and find it very fascinating how much work that go's into your photography.
You're an engaging and enthusiastic bloke, keep it up man.
edit: Do you have a social media for the pictures you upload?
Thanks brother, great to see you.
@@AstrocandyTV
Things are good man, I’m still climbing and working on trees in this beautiful British weather hahah.
Side note on the Insta stuff, throwing your pictures up with a few hashtags could serve as a good catalyst to be linked to your CZcams for channel discovery. The algorithm is rough these days. But if that’s not your focus just ignore me hahaha. Anyways, nice to see you doing well friend.
You had my sub at “plooooossl” 😂😂😂
Welcome aboard and happy NY!
What about upgrading the diagonal for 70400 telescope?
Without glasses on one can just adjust the focus and see just as well
People with astigmatism don't have that option.
Also if multiple people are observing need to change focus continuously can become hindrance.
@tuunaes As long as the exit pupil is smaller than the pupil diameter, astigmatism will not matter
Great video, thank you. Particularly the advice on upgrading the star diagonal, I also have a 6SE and 3 of the X-cel LX eyepieces. Will look to upgrade the diagonal ASAP. Would you recommend upgrading to 2" or sticking with the 1.25?
Hi, thanks for the kind comment. Would recommend you opt for a dielectric 1.25 diagonal rather than the 2" on the C6 as you won't be able to take advantage of the extra girth the 2" offers.
@AstrocandyTV Brilliant, will bear that in mind, thanks!
Hi, what you see if you put 2,3mm eyepiece in this telescope?
That scope is F10, as most SCTs are. A 2.3mm eyepiece will result in an exit pupil of around 0.2mm, which means it would be very very dim and hard to see anything at all.
Typically a good eyepiece match is one that results in an exit pupil between about 1 and 5mm, but certain objects are fine as low as 0.5mm and very dark places the eye can adapt to as much as 7mm (eventually, if you're young).
The 25mm they chose for this comes to 2.5mm, which is usually right around where people feel most comfortable.
Dim blur:
Because that results in magnification grossly exceeding aperture's resolving power.
Also neither is light collecting power enough to produce much image brightness.
@wileecoyoti I think you meant to say exit pupil not eye relief. 1-5mm of eye relief is practically unusable,
@@k.h.1587thanks for catching that! Updated my post for future readers
I have a set Brandon’s
a set of Edmund RKE’s
I have few ES 82 fov’s
Also a set of TMB planetaries
9mm thru 2.5mm
Circle T Japan Ortho’s
However something over looked here is the F ratio of the scope you’re looking through.
F/5 and F/10 scopes are very different on all eyepiece design.
I have several Refractors
Old school Crown and Flint
design.
6 inch F/15
6 inch F/5
8 inch F/9
4 inch F/13.2
When looking for the faintest I could see like how many of Saturn moons could I see.
The Brandons showed stuff the others could not see.
The exception was the RKE’s with only 3 lens in them they surprised me time and again.
The Brandons just get out of the way. You know it is not the eyepieces holding things back
I have a huge amount of Visual observing.
Telvue eyepiece’s are very good.
However their Plossls could come close to the Brandons
on the F/15 and F/9 scopes.
Even the RKE’s showed fainter stars.
So unless you looking for huge FOV.
Check out the Brandons.
RKE’s are harder to come by and have gotten pricey at $110.00 usd.
Thanks for the info! If the clouds ever go away I might just do that
Are Kellner eyepieces any good?
Moderate viewing angles and apparent field of view up to around 50 degrees, well-made ones should be comparable to a decent plössl. Worth bearing in mind that scopes slower than f/6 will be less demanding of the eyepiece. Colour fringing likely to become apparent with scopes faster than f/5 with a Kellner. Personally, I've never looked through one, just did a bit of an internet trawl to answer your question.
Ohh I actually have a Celestron 114 LCM, the 9mm kellner is definitely hard to look through with glasses. Also I was wondering whether it is worth to invest in a dedicated astrophotography camera which are pretty darn expensive or just try pulling it of with an iPhone using nightcap and the Celestron Nex YZ mount for deep sky objects.
@@sreeadityabattu3619I love my dedicated astro camera. The capabilities of a TEC-cooled astro cam are well worth the price imo. You can snag an Altair Hypercam 26M for around £1500 new these days. Given that it's the same camera as a ZWO 2600MM but in purple that is an absolute steal.
@@sreeadityabattu3619 Per focal length Plössl has equally short, or IIRC tiny bit shorter, eye relief than Kellner making non long focal lengths harder to use. That's because eye relief of all non-modern design eyepieces is always fixed percentage of focal length.
Also unfortunately you were frauded/scammed by Celestron and 9mm likely exceeds, or at least badly pushes, resolving power of that telescope's total garbage design and junk quality optics. You recognize that type of scam reflectors from tube being like half the focal length.
Real Newtonian has always roughly as long tube as focal length.
And even then some of cheaper models, including multiple Celestrons, are scams with spherical mirror, which can't focus light accurately because of spherical aberration. (Google/check Wikipedia for that)
Plosstraphobia is a real thing
What size telescope are you using? Sorry if you mentioned it in the video
It's a Celestron C6 with a focal length of 1500mm f/10
Bad music start, but you're one to something, though, just all the music shit isn't needed imo. You really could have something here if it became a more peaceful presentation with the hobby in General
Jeepers bro, you got nearly 7k views on your last vid. Keep it going and when you hit your first Mil, dont forget me mate LOL
Could never forget you, mate