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Newbee eye piece help

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#1 Drock6687

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Posted 22 September 2022 - 08:45 PM

Hey all,
Just looking for some eye piece help. I recently bought a celestron StarSense 10" dob and only have the eye piece that it came with.
Looking for a few more ... any suggestions?
Cheers 🍻

#2 Gridley

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Posted 22 September 2022 - 08:51 PM

I have an Orion XT10 and my go-to EPs are the AstroTech UWA 2" 82deg 28mm and I bought a used explore scientific 1.75" 82deg 8.8mm.  That plus a 2x barlow will set you up. 


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#3 Sincos

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Posted 22 September 2022 - 09:00 PM

welcome.gif Drock6687 , nice scope.   Just for sweeping up whatever you go looking for a 32mm  paired with a variable zoom for when you get there . Now that is an economical way to get you started then see what you think you need to fill in whatever gap you find in magnification or field of view . The 10in dob is the one in my stable that is used the most . Have Fun and Clear Skies


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#4 Hwunkzeep

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Posted 22 September 2022 - 09:05 PM

If I could have only one eyepiece it'd be my Orion 8-24mm Pro Lanthanum Zoom.

 

With my 8" Dob it yields 50x to 150x, or with a barlow 100x to 300x.

 

Or to put it another way - if somehow all my eyepieces were "gone" and I had to start over this would be the first eyepiece I'd replace.

 

It may cost $250, but with a barlow this covers a LOT of territory that would require far more monetary investment via regular eyepieces - and the hassle of swapping them, refocusing, acquiring the target again, etc.

 

But with that said I still find plenty of uses for my regular eyepieces too...



#5 FRANKVSTAR

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Posted 22 September 2022 - 09:12 PM

Astro Tech   Paradigm Dual ED  25mm &  12mm with there 2x achromatic barlow  is a good start. With the barlow you end up with 4 sizes .



#6 Dave Mitsky

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Posted 22 September 2022 - 09:16 PM

The 2" 82-degree AFOV 28mm Astro-Tech UWA is a fantastic eyepiece for its current sales price.

 

https://www.astronom...2-eyepiece.html

 

The 1.25" UWAs are on sale for only $99.95.

https://www.astronom...ece_series=1051

 

The 60-degree AFOV A-T Paradigm Dual EDs are very good at a lower cost.

 

https://www.astronom...iece_series=478

 

CN members get a small discount on non-sales items.


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#7 BlueTrane2028

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Posted 22 September 2022 - 09:17 PM

What's your budget?


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#8 zakry3323

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Posted 22 September 2022 - 09:18 PM

Here's the big question: 

 

Do you wear glasses for astigmatism? If so, how bad is the astigmatism? 

 

If you have astigmatism, your compromises will revolve around eye relief if you prefer to wear glasses, or whether or not the eyepieces in question are compatible with dioptrxs' (which will still require considerable eye relief, though not as much as with glasses), and at the point at which the exit pupil produced is small enough to mitigate the effects of "football eyeballs syndrome", as I've started to not-so-affectionately call it. 



#9 havasman

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Posted 22 September 2022 - 09:56 PM

You have to tell us what you intend to spend. Otherwise you get cheap zooms and Ethos sets suggested. One is inappropriate and we gotta know which.

 

Nice scope!


Edited by havasman, 22 September 2022 - 09:57 PM.

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#10 SirLoyne

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Posted 23 September 2022 - 02:09 AM

Something in the 30ish mm range for hunting down DSO's. I have a 31mm that works great. Something in the 20ish mm range for looking at the DSO's once you find them. I have a 17.5mm and a 24mm for this.



#11 Drock6687

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Posted 23 September 2022 - 06:51 AM

Wow thanks for the response!
I'm not overly concerned on budget. I rather spend more then then get something cheaper that I'll want to upgrade in 6 months

#12 vtornado

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Posted 23 September 2022 - 07:44 AM

It is also hard to know what you want, until you get some experiece under your belt.

Since eyepieces interface with your eye, they are very personal.  Things like apparent

field of view, eye relief, abberations etc. are tolerated in different amounts by different

observers.  It might not be that you have to upgrade in 6 months, it might be that

you found out what you bought is inappropriate for you.

 

I would consider what Sincos has said in post #3 a zoom, a 25mm 60 degree or 32mm plossl. Maybe a 30mm two inch eyepiece for max field of view.  However these are expensive.


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#13 aeajr

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Posted 23 September 2022 - 08:52 AM

I don't know how much you know about eyepieces and the terms used to describe them so I recommend you read these two articles.  I wrote them a couple of years ago so some of the eyepiece recommendations might change, though they are still valid.   

 

Understanding Telescope Eyepieces- There are recommendations, based on budget, but the meat of the article is about understanding the considerations and specifications to know when selecting eyepieces.
https://telescopicwa...cope-eyepieces/

 

Understanding and using a Barlow Lens
https://telescopicwa...ens-and-how-to/

 

 

This chart shows my eyepiece set, built over 4 years, so you can see how magnification scales and it gives you an estimate of the field of view.

 

The ES 82 and Meade 82 have an 82 degree apparent field of view, AFOV

The Agena Astro SWA has a 70 degree AFOV

 

The Bolded ones were my most used in this scope.  About the same FL as your scope.

 

 

Dob Newtonian, 1200 mm FL 

AA SWA 70   38 mm               31.5 and 2.2 degrees  FOV   2”
Meade 82      20 mm               60X  and   1.37 degrees         2”       

 

ES 82          14 mm                86X and .95 degrees 
ES 82          11 mm              109X and       .75 degrees
ES 82          8.8 mm             136X and .6 degrees      
ES 82          6.7 mm             179X and .45 degrees      
Meade 82   5.5 mm             218X and      .37 degrees
ES 82           4.7 mm           255X and      .32 degrees
ES 82          8.8+2XB          272X and .3 degrees
ES 82          6.7+2XB          358X and .22 degrees
Meade 82   5.5+2XB           436X and .18 degrees

 

Baader Hyperion 8-24  zoom  50X to 150X
Baader Hyperion 8-24+1.5XB  75X to 225X (My most used 1.25” eyepiece

)Baader Baader Hyperion 8-24+2XB   100X to 300X

 

 

THE ZOOM EYEPIECE INSTEAD OF OR IN ADDITION TO SINGLE FOCAL LENGTH EYEPIECES – The zoom is my favorite eyepiece.

 

TIGHT BUDGET? – Get a zoom and a Barlow     An 8-24 mm zoom eyepiece plus a Barlow somewhere between 2X and 3X will give you almost the full typical range of most scopes for as little as $120. Add one or two low power wide view eyepieces and you have that full range.  In your scope, these would be 2" eyepieces, as shown in the chart. 

 

The zoom is single eyepiece that effectively replaces a range of eyepieces.  Works like the zoom lens on a camera.   In a 1200 mm FL scope it will provide every magnification from 50X to 150X without gaps.  Put it an 2X Barlow lens and you have 100X to 300X.

 

The zoom sounds great, but there is a trade-off.  The field of view of the zoom runs from a narrower AFOV at the 24 mm range to a wider FOV at the 8 mm range.  So, like any approach, the zoom is a compromise.  I find that compromise quite acceptable when weighed against the benefits listed below, I prefer the zoom.

 

I used the Baader Hyperion Zoom 8-24 mm in my 8” (now sold) and now my 12” Dob.  Usually this is the only 1.25” eyepiece that I use. In the 8” Dob I usually used it with a 1.5X Barlow lens attached to give me 75X-225X which was an excellent match for that scope as I frequently topped out around 200X at my location. 

 

In my AD12 12” Dob I use the Baader Hyperion 8-24 zoom for the midrange, up to 190X, then I typically go to single FL 82 degree eyepieces.  As I have a low power wide view 20 mm eyepiece I tend to use the zoom mostly in the 18 mm to 8 mm range.  

 

I also own the Celestron 8-24 which is not as wide or quite as well corrected as the Baader Hyperion, but for 1/3 the price it does a pretty good job.  This was my first zoom. 

 

Lower cost zoom – Celestron 8-24 – This was my first zoom.  Works well at the price and a good way to test your interest in zooms. $90
Higher priced Zoom – Baader Hyperion 8-24 mm – My main eyepiece in the XT8i – $300  There are other choices.
https://agenaastro.c... Zoom eyepieces

 

 

  • I never expected the zoom eyepiece to become my primary eyepiece, but it has.
  • With a zoom, the eyepiece seems to disappear as you just move in and out at will, no swapping, no thinking about eyepiece changes
  • The Celestron 8-24 zoom is good and comparable to my Plossl eyepieces
  • The Baader Hyperion is great and comparable to my Explore Scientific eyepieces
  • Watching doubles split as I rotate the barrel is wonderful
  • One filter serves over a wide range of magnifications, no screwing and unscrewing to try other eyepieces
  • Moving smoothly between small changes in magnification helps when seeing is not the best
  • I am always working at the optimum magnification for this target.
  • Sharing the view with others is easier, especially in my manual tracking Dob - I hand it over at low mag so it stays in the view longer.  They zoom back in to whatever magnification works best for them.
  • Kids love the zoom

When I observe, 90% of the time, in all of my scopes, I use one or two low power, then the zoom or zoom + Barlow depending on which scope I am using. 


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#14 Drock6687

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Posted 24 September 2022 - 06:17 PM

Wow so much info. I think I'm ever more confused lol
Thanks again for the info everyone!

#15 Drock6687

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Posted 24 September 2022 - 06:31 PM

I was thinking about the explorer scientific 62* in 5.5mm,14mm and 26mm to start off with... decent start with my 10" celestron starsence ? Any down sides ?



#16 Captain Quark

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Posted 24 September 2022 - 07:46 PM

I’m a newb with a 10” dob. I decided to focus first on planetary since I live in a light polluted area, planets are easy to find and see, and they’re all lined up right now and for the next few months. So I went with relatively high mag and a Pentax xw 5mm and 7mm first to see what would happen. I’m getting into wide FOV lower mag now and actually haven’t gotten my eyepieces yet. Just using the 30mm that came with the scope. So my advice would be focus first on just one type of viewing, see what happens, and make decisions from there. Also read up on exit pupil and correcting your astigmatism if you have one. Both of those things will influence your eyepiece choices. At first I thought I was going to just have 3 eyepieces and a Barlow/powermate but as I’ve done this more and more, I’ve found out things and found that I like doing things in ways that are going to mean I need more eyepieces than I originally thought.



#17 aeajr

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Posted 24 September 2022 - 09:33 PM

I was thinking about the explorer scientific 62* in 5.5mm,14mm and 26mm to start off with... decent start with my 10" celestron starsence ? Any down sides ?


Why these eyepieces?
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#18 SeattleScott

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Posted 25 September 2022 - 12:47 PM

I was thinking about the explorer scientific 62* in 5.5mm,14mm and 26mm to start off with... decent start with my 10" celestron starsence ? Any down sides ?

First of all that leaves a huge gap between 5.5 and 14. Need some 9-10mm to fill in. Maybe you have such an eyepiece that came with your scope.

 

These are just five element eyepieces so they won't be especially well corrected in fast scopes like yours. That being said they aren't especially wide, so maybe they would be ok. Generally you want four elements for 50 AFOV and seven elements for 82 AFOV for a fast scope like yours. So maybe five elements is good enough for 62 AFOV? Maybe. Idk.

 

Consider that the 62 AFOV ES eyepiece with five elements costs $150. Meanwhile the 7mm Astrotech ultrawide is 82 AFOV with seven elements. Sure the ES is waterproof so you can stargaze in the rain, but generally the Astrotech seems like better value to me.

 

Scott


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#19 vtornado

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Posted 25 September 2022 - 02:44 PM

I might skip the 25mm 62 for now, You already have a 25mm 50 degree.

Maybe 15, 9, 6 ???

9 and 6 redlines are really good. for the money.



#20 Spile

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Posted 25 September 2022 - 03:37 PM

I like a zoom, Barlow and wide angle combination https://astro.catshi...-zoom-eyepiece/


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