Setting to save FITS files without stretching

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saguaro
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Joined: Tue Feb 14, 2017 9:04 pm

Setting to save FITS files without stretching

Post by saguaro » Wed Mar 14, 2018 11:57 pm

I have a ZWO1600 color camera, and would like to know the pros/cons of the setting to save FITS files without stretching.
1018A691-FE28-4140-B653-660BBEA2A4F2.jpeg
1018A691-FE28-4140-B653-660BBEA2A4F2.jpeg (208.4 KiB) Viewed 162 times
Thanks.

-Robin

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Re: Setting to save FITS files without stretching

Post by admin » Thu Mar 15, 2018 7:54 pm

Hi,

Cons:

* Images may look dark when viewed unless you stretch them
* If you have adjusted the gamma/contrast/colour balance controls away from default, you may loose some data
* If you are using RGB or MONO modes on a colour camera you may loose some data

Pros:

* Some analysis software is not happy with the stretched FITS files, so having the correct values would fix any issues there

In generaly, unless you know you need to do it then don't!

cheers,

Robin

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