Hi everyone,

I use Kstar/Ekos software to control the Sony A7iii, I need to get the image in FITS mode and I would use the compressed raw format, that reduced the image size from 45Mb to 23Mb. But I noticed that if I choose to download the image direct in FITS format their size still remain of 45 Mb even I switch to the compressed format (option avaible directly on the camera and not in the INDI driver). On the other hand if I choose to download the image in the NATIVE format, the compressed option take effect and the result image is about 23 Mb.
So I would ask you if is it possible to obtain the FITS image in the compressed format or it is possible only for the NATIVE raw format?

Thanks.

Luca

It is two different formats, and two different compressions. If you store as FITS, EKOS decodes the image from the camera, and stores it as FITS. And (standard) FITS is always uncompressed.
(There is some definition for compressed FITS, but I have no clue if many programs actually support it)

Ok, this is exactly what I was worried about :')

Anyway, thanks Peter.