Page 1 of 1
flat frames
Posted: 16 Jan 2021, 05:54
by maplearn
Cannot fame any detailed instructions in the manual on flat frames. How long should the exposure be and how bright the image should be, is there a way to measure the brightness of the image?
Thanks,
Ernie
Re: flat frames
Posted: 16 Jan 2021, 16:45
by Iver
In the bottom left corner of your flat there are some numbers, B is the background average. For my 16 bit camera I try to get that value between 25,000 and 30,000. In that range my flats correct very well. For a 12 bit camera you will need a lower range. In the AstroArt help topics search for "Flat Field" for more info.
Re: flat frames
Posted: 18 Jan 2021, 01:10
by maplearn
There are light and dark frame choices, for a flat frame I should just take a light image?
Ernie
Re: flat frames
Posted: 18 Jan 2021, 04:14
by Iver
The Dark Frame choice in the image tab closes the camera shutter if the camera has one.