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EAA and refractors

EAA Refractor
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#51 Tfer

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Posted 24 June 2022 - 11:26 AM

The Sky Watcher Evoguide 50 is definitely on the short list.

Both my cameras are undersampled. That doesn’t matter at all to me. When I’m performing EAA, I don’t pixel peep.

The 178 is my primary planetary cam - it gets thrown into duty as a widefield camera until planet season arrives.

#52 SchoolMaster

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Posted 24 June 2022 - 02:48 PM

Looking at small-bore wide-field, just about everything is undersampled, but due to the wide field, stars are often only 3 x 3 pixels, so even for many AP practitioners, that doesn't matter in the big scheme of things.  The 294MM on order can be run at just under 2.4 micron pixels.  I'm good with that.

 

My short list was the Askar 180, SharpStar61EDPHII, and AT60ED.  I decided to go for max FOV, wondering even if I could borrow a full frame camera body from school for even more FOV, although I have no clue how to use it to stack and capture.



#53 SchoolMaster

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Posted 26 June 2022 - 11:56 AM

Another look at things

 

astronomy_tools_fov (64).png

 

From smallest to largest FOV

 

9.25" HyperStar

8" HyperStar

6" HyperStar and AT60ED with 0.8 reducer

Evoguide 50mm and RedCat51

Askar FMA 180

 

The refractors at all around 4.5 - 4.9, HyperStar 1.9 to 2.0

 

At full price, a C6/HyperStar is around $1350, but there's a used OTA for $450 on classifieds, so street price is much closer to $1,000.  The comparable FOV OTA, the AT80ED with reducer/FF is about $560.  The C6 + HyperStar, otherwise naked, is about 5lb heavier than the AT60ED/Reducer.  The C6/Hyperstar is much faster and has about four times the effective aperture, about 16,000mm squared to 3600 mm squared.

 

 

EDIT:  Now you've got me thinking steveincolo :)


Edited by SchoolMaster, 26 June 2022 - 05:12 PM.

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#54 SchoolMaster

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Posted 17 July 2022 - 09:40 AM

What I got for my money.

 

An early capture from the Askar FMA 180 and 294MM Pro.

 

NGC7000

Gain 450, 10 x 30secs SVBONY 7nm Ha filter

 

12JulNGC7000-PA4-G450m-10-30-D-F7Ha-c0.jpg

 

I'm very happy and satisfied with the FOV and results from this OTA/Camera combination.


Edited by SchoolMaster, 17 July 2022 - 10:00 AM.

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#55 steveincolo

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Posted 17 July 2022 - 10:01 AM

Another look at things

 

attachicon.gifastronomy_tools_fov (64).png

 

From smallest to largest FOV

 

9.25" HyperStar

8" HyperStar

6" HyperStar and AT60ED with 0.8 reducer

Evoguide 50mm and RedCat51

Askar FMA 180

 

The refractors at all around 4.5 - 4.9, HyperStar 1.9 to 2.0

 

At full price, a C6/HyperStar is around $1350, but there's a used OTA for $450 on classifieds, so street price is much closer to $1,000.  The comparable FOV OTA, the AT80ED with reducer/FF is about $560.  The C6 + HyperStar, otherwise naked, is about 5lb heavier than the AT60ED/Reducer.  The C6/Hyperstar is much faster and has about four times the effective aperture, about 16,000mm squared to 3600 mm squared.

 

 

EDIT:  Now you've got me thinking steveincolo smile.gif

Try out your C8 Hyperstar and see if you like it.  I already had a C6 so the (relatively less expensive) C6 Hyperstar was an easy choice.  



#56 SchoolMaster

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Posted 17 July 2022 - 10:04 AM

Well, I have tried it out, but. as you know, the weather and result was disappointing.  I'm waiting for better weather.



#57 steveincolo

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Posted 17 July 2022 - 10:34 AM

Well, I have tried it out, but. as you know, the weather and result was disappointing.  I'm waiting for better weather.

It's wasted a bit on globs.  Try it on nebulas and (larger) galaxies.  



#58 SchoolMaster

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Posted 17 July 2022 - 12:21 PM

It's wasted a bit on globs.  Try it on nebulas and (larger) galaxies.  

If Globs are all I can find, Globs is what I get :)


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