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Budget/Quality Wide FOV eyepiece

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#1 DanielG8686

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Posted 12 July 2020 - 05:03 PM

Hey there.. I have a Celestron 130EQ.. Got it for free. But im buying a Skywatcher 10” Goto Dobsonian. Im looking to get a 2” eyepiece that will work for both telescopes (I know ill need an adapter for the 130eq).. I dont want to spend much more that $125.. I want a nice wide fov and low power for searching the night sky and galaxies/nebulae. I know its not a ton to spend but id like a quality piece that doesnt have a bunch of distortion on the outside.. Please let me know what you think. Thanks a bunch

Edited by DanielG8686, 12 July 2020 - 05:25 PM.


#2 RyanSem

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Posted 12 July 2020 - 05:06 PM

I'm a big fan of the Celestron Luminos line. 82 degree FOV and a real economical eyepiece. 



#3 DanielG8686

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Posted 12 July 2020 - 05:08 PM

I'm a big fan of the Celestron Luminos line. 82 degree FOV and a real economical eyepiece.


Those are $270+

#4 DSOGabe

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Posted 12 July 2020 - 05:18 PM

Not sure how wide a FOV your have in mind, butI have an Apertura 32mm Super Wide Angle. AFOV is  70*. Cost me $100. I've only used it a few times, but I think the views it gives a great


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#5 DanielG8686

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Posted 12 July 2020 - 05:24 PM

Not sure how wide a FOV your have in mind, butI have an Apertura 32mm Super Wide Angle. AFOV is 70*. Cost me $100. I've only used it a few times, but I think the views it gives a great


Why have you only used it a few times? I want a wide field for searching and nebula/galaxies

#6 vdog

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Posted 12 July 2020 - 05:33 PM

Unless that 130 has a 2" focuser, you won't be able to use a 2" eyepiece with it.

 

The 70 degree SWA EPs are sold under different brand names from different vendors and are in your price range.  A 32mm would give you an exit pupil of nearly 7mm, which is fine if your pupils dilate that wide, but there is also a 26mm version which would provide a smaller exit pupil.

 

Does it have to be 2"?  And how do you feel about buying used?  You can probably get an Explore Scientific 68 degree 24mm for about 125.00 in the classifieds.  That's a nice, sharp, wide-angle eyepiece, and it would work in both scopes.


Edited by vdog, 12 July 2020 - 05:40 PM.

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#7 Taosmath

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Posted 12 July 2020 - 05:33 PM

I like the Orion 32mm Q70 (70 degree TFOV) - same as Agena SWA, which are about $10 cheaper ($100 vs $90).  I find the 38mm a bit too chunky.

 

You can save some $ by buying used on classifieds here - maybe save yourself $25 or so or get a slightly higher quality piece for your $.  It' v. low risk if you buy from someone with good feedback.



#8 DanielG8686

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Posted 12 July 2020 - 05:41 PM

Unless that 130 has a 2" focuser, you won't be able to use a 2" eyepiece with it.

The 70 degree SWA EPs are sold under different brand names from different vendors and are in your price range. A 32mm would give you an exit pupil of nearly 7mm, which is fine if your pupils dilate that wide, but there is also a 26mm version which would provide a smaller exit pupil.

Does it have to be 2"? And how do you feel about buying used? You can probably get an Explore Scientific 68 degree 24mm for about 125.00 in the classifieds. That's a nice wide-angle eyepiece, and it would work in both scopes.


I think they make a 2” to 1.25” adapter for the 130eq focuser.

#9 KTAZ

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Posted 12 July 2020 - 05:46 PM

The problem that you have is your scope is pretty darn fast. At f/4.7 "budget" wide-field eyepieces are not going to perfrom nearly as well as in f/10 or f/15 scopes.



#10 RyanSem

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Posted 12 July 2020 - 05:53 PM

Those are $270+

They are? I see them for around $70-100 on the classifieds all the time. Both the 1.25 and 2" versions.



#11 DanielG8686

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Posted 12 July 2020 - 06:00 PM

They are? I see them for around $70-100 on the classifieds all the time. Both the 1.25 and 2" versions.


I do t want to buy used

#12 DanielG8686

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Posted 12 July 2020 - 06:00 PM

They are? I see them for around $70-100 on the classifieds all the time. Both the 1.25 and 2" versions.


I do t want to buy used

#13 Taosmath

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Posted 12 July 2020 - 06:01 PM

I think they make a 2” to 1.25” adapter for the 130eq focuser.

I think Vdog's point is that the 130EQ has a 1.25" focuser so you can't use a 2" EP in it.  The 10" Dob will have a 2" focuser in it, which, if you use a 2" to 1.25" adapter, will let you use 1.25" EP's in it, so you can use a 1.25" EP in a 2" focuser, but you can't do it the other way round.

 

The problem that you have is your scope is pretty darn fast. At f/4.7 "budget" wide-field eyepieces are not going to perfrom nearly as well as in f/10 or f/15 scopes.

While true, I haven't noticed anything very objectionable when using the 32mm in my F4.5 Dob.  Then again, I'm probably not very picky....


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#14 CharlieB

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Posted 12 July 2020 - 09:24 PM

Folks, this is being moved to Eyepieces.

 

Charlie


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#15 Jond105

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Posted 12 July 2020 - 09:32 PM

Since you want budget, the SWA’s are your best bet. If you do live in the lower 48, do not fear buying used from here on CN. My scope and 3 of my eyepieces were all purchased used. But if new, the 70 degree vdog recommended is your best bet new.

#16 whizbang

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Posted 12 July 2020 - 11:31 PM

I like the Williams Optics 72 degree 33mm and 40mm SWAN's as well as the Bresser 70 degree 25mm and 30mm.


Edited by whizbang, 12 July 2020 - 11:32 PM.

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#17 SeattleScott

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Posted 13 July 2020 - 12:40 AM

They are? I see them for around $70-100 on the classifieds all the time. Both the 1.25 and 2" versions.

I have the 10 Luminos, reportedly one of the better ones in the series. It struggles at low F ratios like he would need. The 2” ones are generally over $100 used, maybe $150 depending on the FL.

Unfortunately I know of no 2” eyepiece that will perform reasonably well sub-F5 for $125, especially new. I think it would be hard enough to find something used. Sure you could get a 56mm Plossl or something but exit pupil would be huge. The budget superwides with quite a bit of distortion go for about $90-100 so your budget just isn’t high enough to get something with better performance.

Scott

Edited by SeattleScott, 13 July 2020 - 12:59 AM.


#18 SeattleScott

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Posted 13 July 2020 - 12:52 AM

Unless that 130 has a 2" focuser, you won't be able to use a 2" eyepiece with it.

The 70 degree SWA EPs are sold under different brand names from different vendors and are in your price range. A 32mm would give you an exit pupil of nearly 7mm, which is fine if your pupils dilate that wide, but there is also a 26mm version which would provide a smaller exit pupil.

Does it have to be 2"? And how do you feel about buying used? You can probably get an Explore Scientific 68 degree 24mm for about 125.00 in the classifieds. That's a nice, sharp, wide-angle eyepiece, and it would work in both scopes.

Good advice here. A new Celestron Xcel LX or a used ES 24/68 is within your budget, well corrected and can be used in both scopes. Sure you can buy a Agena/Q70/Swan 32mm 70 AFOV which would go wider, but the extra field will be distorted. Maybe distorted is better than nothing. But the ability to use it in either scope has value.

Scott
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#19 DanielG8686

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Posted 13 July 2020 - 02:16 AM

Awesome advice everyone! Thanks so much!! So if I was just going to buy a 2” wide FOV over 30mm for my 10” Skywatcher Dob.. What would I have to spend to get a new EP that has good views up to the edges and would make the stars pop.. Ill be pairing this EP with a Baader 8-24 Mark IV Zoom

#20 CeleNoptic

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Posted 13 July 2020 - 02:53 AM

Awesome advice everyone! Thanks so much!! So if I was just going to buy a 2” wide FOV over 30mm for my 10” Skywatcher Dob.. What would I have to spend to get a new EP that has good views up to the edges and would make the stars pop.. Ill be pairing this EP with a Baader 8-24 Mark IV Zoom

 
Possible premium option 1; premium option 2.
               budget option 1; budget option 2
 
Don't forget that ANY Newtonian like 10” Skywatcher Dob will show Primary Mirror coma (not an eyepiece fault). Therefore, to get good views up to the edges in 82* AFOV on a F/4.7 Dob you may need Coma Correctior like this or this.
 
Although, AFAIK, they frequently pair Baader Zoom with some shorter FLs like this.



#21 sg6

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Posted 13 July 2020 - 03:39 AM

You will not get good views to the edge, without sorting out a fast mass produced mirror and then a costly 2" eyepiece. In optics sharp and edges don't go together without lots of $$$ being applied.

 

As it seems to be for a 1.25" focuser as much as a 2" you are likely best just to settle on the normal 24mm 68 degree offerings. However the gain over even a basic long plossl is in a way minimal - is 0.2 degree worth 3x the cost? And that is if you can believe the numbers thrown around.

 

Looking at the Vixen NPL plossls a 40mm would deliver a little more then their 30mm. Around 6% more field, not a lot.

As said does come down to have accurate the numbers given are: is a 32mm plossl 32mm or 30mm, is 52 degrees 52 or 50. Marketting has I suggest made the area a bit "grey".

 

If you want "wide" you are more drawn to a 32mm claim, even if identical to another 30mm eyepiece. Same on field, you will read the 52 degree one not so much the 50 degree one.

 

The WO SWANS are nice but they were recommended for f/6 and slower by WO at one stage, that limitation was pulled after a while. Guess people didn't buy so the limitation was removed from the description. Fairly nice eyepieces, nice and simple. They come in assorted focal lengths, not all called WO's so you will have to search for the non-WO focal lengths under whatever brand names, if you went for them.

 

Unfortunately the only way to find out is to try, and if not at a friendly club it can get expensive, and you get lots of eyepieces in the process.


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#22 Hesiod

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Posted 13 July 2020 - 04:40 AM

I think they make a 2” to 1.25” adapter for the 130eq focuser.

Miserable idea as the 2" eyepiece will vignette horribly, and could not even reach focus.
In my 130/650 a 20mm/70° 1.25" is my first choice for low power sweeps; another worth option is a 32mm Plossl (excellent, and better than the 20mn if want to observe large nebulae).
While the cheap SWAs are far from perfect in so fast telescopes, mind that even a 300+$ EP can not do anything about the reflectors' own coma...
The same applies to the larger Dob too but in this case if are "finicky" may solve with a coma corrector such as the ParaCorr by Tele Vue (obviously not cheap...)

Edited by Hesiod, 13 July 2020 - 04:44 AM.


#23 SeattleScott

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Posted 13 July 2020 - 08:18 AM

The cheapest way to good edge performance is the APM 30 UFF. $230. I don’t have it but people routinely compare it to Televue Panoptics, and often favor the APM. The 70 AFOV field is a nice balance of getting the 2” wide field experience without too much intrusive coma. Of course you could get a 30mm 82 AFOV eyepiece and a coma corrector but that is a considerable investment.

Another possibility is what I did, got the ES 24/82. More magnification and better exit pupil with nearly as wide of a view. However coma is more apparent at the edge, it is probably more expensive, and I frankly get the impression the APM is sharper (not that I am complaining about the ES, but people rave about the APM). But the APM didn’t exist at the time.

Scott

Edited by SeattleScott, 13 July 2020 - 08:20 AM.

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#24 tony_spina

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Posted 13 July 2020 - 11:06 AM

Your cheapest route to a 2" new eyepiece that is sharp to the edge will be the APM 30MM UFF.

 

Sharp and cheap ($125 is what you stated was the budget)  doesn't exist in a new 2" eyepiece for use in a fast focal ratio telescope 


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#25 SteveG

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Posted 13 July 2020 - 12:25 PM

Hopefully you understand that no 2” eyepiece will work in your 130 EQ. Yes, you can get an adaptor, but you won’t be able to focus it.




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