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Do I need a UV/IR cut filter?

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5 replies to this topic

#1 pinzmann

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Posted 08 December 2019 - 02:40 PM

I just purchased a ASI294 Pro. My first Astro camera. Would a uv/ir cut filter be beneficial for my images?

#2 Ballyhoo

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Posted 08 December 2019 - 02:51 PM

congrats on the new camera!    I have the same camera and I have never used an UV/IR cut filter. the thing is maybe my images could have some improvements.  You can see all of my images on astrobin are ok without one; however perhaps I have been derelict in not using the UV/IR. Interested to read the responses myself.


Edited by Ballyhoo, 08 December 2019 - 02:52 PM.


#3 OldManSky

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Posted 08 December 2019 - 03:18 PM

If you're using it with a Newtonian reflector, no.

If you're using it with an SCT...maybe.

If you're using it with a refractor (even a nice triplet APO) -- yes.

 

:)


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#4 bobzeq25

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Posted 08 December 2019 - 03:22 PM

Yes.  Your stars will be smaller.  It's not essential, but it's useful.


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#5 Peter in Reno

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Posted 08 December 2019 - 03:52 PM

It's a good idea for all types of scopes. Reflectors or compound scopes may be more immune than refractors but if you use a reducer or flattener lens, then it wouldn't hurt to use UV/IR filter. Star shapes may look less natural if you don't use UV/IR filter especially for RGB imaging. 

 

Peter 


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#6 MCO Pilot Astronomer

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Posted 08 December 2019 - 09:31 PM

I added one for my refractor based on CN advice and it's an incredible difference. 

 

The star bloat without it. I've now added one to my 10" LX850 and my Canon T3i (drop in). I don't think I'd want to image without it. 

 

First without it. 

Heart Final Jan19
 
Then with an IR Cut. Obviously, not everything perfectly equal but I think it's an improvement. 
Heart

Edited by MCO Pilot Astronomer, 08 December 2019 - 09:32 PM.

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