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Camera gain settings and calibration frames

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6 replies to this topic

#1 X-Lurker

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Posted 27 October 2020 - 02:42 PM

Will I need to re-take flats, darks and darkflats to match new/changed gain settings?  I have a bit of a library saved and just realized that the gain setting on my 1600MM Pro may not have been optimal..

 

Thanks for your help

Larry



#2 randcpoll

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Posted 27 October 2020 - 03:08 PM

Flats no, but the rest, yes.



#3 X-Lurker

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Posted 27 October 2020 - 03:14 PM

Flats no, but the rest, yes.

I was hoping that wasn't the case gaah.gif Thanks randcpoll



#4 rgsalinger

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Posted 27 October 2020 - 03:40 PM

I'd need to see something authoritative that says the flats don't have to match the gain and offset values of the light frames. 

 

https://www.cloudyni...g-with-asi1600/

 

Rgrds-Ross



#5 X-Lurker

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Posted 27 October 2020 - 03:57 PM

I'd need to see something authoritative that says the flats don't have to match the gain and offset values of the light frames. 

 

https://www.cloudyni...g-with-asi1600/

 

Rgrds-Ross

Well at least flats don't take too long to acquire...

 

Cheers! 



#6 endlessky

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Posted 27 October 2020 - 04:05 PM

Darks (any type) and bias definitely need to match ISO/gain.

Flats, unless you absolutely do not touch the imaging train, I would find it hard to have a library for, anyway. It only takes one new dust particle, or an old one to change spot or disappear, and you'll have a flat from a previous session that doesn't work anymore.

I'd rather invest 5 minutes to take flats at the end of each session, than take my chances and potentially waste hours of data because of laziness.
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#7 rgsalinger

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Posted 27 October 2020 - 05:19 PM

That's really not quite true. If you are permanently mounted then you will probably find, as I have that you can reuse your flats for several sessions quite effectively. I typically take a new set for each of my imaging platforms every two weeks. FWIW. The same would be true if you keep the camera mounted on the OTA and don't rotate it.

Rgrds-Ross




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