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ASI1600mm Noise/Hot Pixels

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#1 astrodd

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Posted 10 August 2020 - 04:24 PM

I am just looking for some confirmation that this is an acceptable amount of noise/hot pixels from a ASI1600mm at unity gain.

 

https://imgur.com/a/Zx335PL

 

It does subtract out quite nicely so it's not a problem.

 

https://imgur.com/a/1nofBdD

 

It does seem like there are a large number of hot pixels. I just don't know if it's normal or not.

 

Thanks



#2 PhotonHunter1

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Posted 11 August 2020 - 07:20 PM

What temp do you run? I typically run -10 and do not have a lot of hot pixels per my data in PI’s cosmetic correction.

Edit: I just viewed your image file - that’s approx. the number I see in my images. At least I’m thinking it’s not a lot... we’ll see what others say should they weigh in.  


Edited by PhotonHunter1, 11 August 2020 - 07:22 PM.

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#3 AZ Maverick

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Posted 11 August 2020 - 07:51 PM

Kind of looks like my ASI1600mm Pro.

I usually cool to -15C.

 

Here is a 100% crop of a Dark image, -15C 300 seconds.

As you say, it processes out fine.

The following images are of course stretched.

 

170949134.Qf2bKwDS.Dark1.jpg

 

The same dark file photo but at 800% zoom.

 

170949135.VEteMCDc.800Z.JPG


Edited by AZ Maverick, 11 August 2020 - 07:53 PM.

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#4 astrodd

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Posted 11 August 2020 - 09:01 PM

Thanks guys. I figured it was normal but wanted confirmation. I am running it at 0c. I will try -10c to see if that improves things at all (but not terribly concerned for reasons already stated). 




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