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CMOS astro camera + wide-field ?

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#1 luxo II

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Posted 29 November 2021 - 01:50 AM

Just wondering if anyone has tried wide-field stuff with a CMOS astro camera rather than a DSLR ?

 

I've just assembled this (ASI533 + M4/3 adapter + 55mm f/1.4 lens from 7Artisans), keen to try it out.. Field is ~ 11 degrees square, obviously smaller than M4/3. I also have a 49-48mm adapter ring so 2" filters will screw on the front.

 

Now if only the darned weather would clear, we have had enough of La Nina... 

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Edited by luxo II, 29 November 2021 - 01:52 AM.


#2 Noah4x4

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Posted 29 November 2021 - 02:12 AM

Plenty of folk are wild field imaging at between f/4 and f/1.9 using astro-cameras, focal reducers or faster scopes or the ultimate solution of Hyperstar. The speeds achieved permit much shorter exposures that capture more photons than at higher f/ratio. Plenty of information in the EAA Forum. Hyperstar is ideal with narrow barrelled astro cameras than DSLRs as the latter tend to block too much light. .

#3 luxo II

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Posted 29 November 2021 - 02:16 AM

Thanks I’m well aware of Hyperstar … I’ll go look at the EAA forum.

Edited by luxo II, 29 November 2021 - 02:17 AM.


#4 happylimpet

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Posted 29 November 2021 - 04:16 AM

it just depends on the quality of the lens.



#5 Wow!

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Posted 29 November 2021 - 04:42 AM

Yep. I need to change this setup, because my guiding is actually much longer focal length compared to the lens

250mm vs 100mm, let alone the size of the pixels as well.

 

U5xMEg6.jpeg



#6 happylimpet

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Posted 29 November 2021 - 10:03 AM

Yep. I need to change this setup, because my guiding is actually much longer focal length compared to the lens

250mm vs 100mm, let alone the size of the pixels as well.

 

 

I wouldnt worry about that, as long as youre detecting stars to guide with. Otherwise no harm in guide focal length being too long.



#7 carolinaskies

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Posted 29 November 2021 - 10:06 AM

Just wondering if anyone has tried wide-field stuff with a CMOS astro camera rather than a DSLR ?

 

I've just assembled this (ASI533 + M4/3 adapter + 55mm f/1.4 lens from 7Artisans), keen to try it out.. Field is ~ 11 degrees square, obviously smaller than M4/3. I also have a 49-48mm adapter ring so 2" filters will screw on the front.

 

Now if only the darned weather would clear, we have had enough of La Nina... 

I picked up an adapter recently to do the same thing with my ASI017MC.  I have to either buy one of those adapters like you've got or rig something up.  



#8 happylimpet

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Posted 29 November 2021 - 10:56 AM

By the way, I bodged some connectors between a canon 50mm f1.2 lens I had lying around and my ASI1600MM. The stars were pretty poor across the field. Probably needed an IR cut filter.



#9 carolinaskies

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Posted 29 November 2021 - 11:04 AM

Could be backspacing too


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