Taking Flats/Dark Bias with Sharpcap for 1600Mm Cool

[Knight of Clear Skies]

I wonder if anyone can help me please. DSS is complaining that the gain setting for my flats and dark bias aren't matching with the lights I took in APT. How do I access the gain and offset settings in Sharpcap please? There doesn't seem to be a control for 'offset', there is 'brightness' but I'm not sure if that's the same thing.

[david_taurus83]

A bit odd. I know with a DSLR you can use flats with a different ISO value to the lights so I wonder why DSS is asking that? You haven't done what I did the once and collect an entire library of darks only to find out later that they saved to png format?!?

[Knight of Clear Skies]

Everything is a 16-bit FITS file (that's a mistake I've made before).

[PeterCPC]

17 hours ago, Knight of Clear Skies said:

I wonder if anyone can help me please. DSS is complaining that the gain setting for my flats and dark bias aren't matching with the lights I took in APT. How do I access the gain and offset settings in Sharpcap please? There doesn't seem to be a control for 'offset', there is 'brightness' but I'm not sure if that's the same thing.

For offset read brightness in Sharpcap.

[Knight of Clear Skies]

2 minutes ago, PeterCPC said:

For offset read brightness in Sharpcap.

Thanks, that's what I suspected, but DSS is still complaining. It says 'gain doesn't match' but I'm not sure if it's the gain or offset setting it doesn't like.

[PeterCPC]

Can't you check in the FITS headers?

[iapa]

Not sure how relevant, but recently I saw a thread where the capture app showed image size as x by y pixels, but calibration frames taken with SharpCap showed x-1 by y-1 (I don’t know if either was right or wrong).

This mismatch in image size caused DSS to barf.

[Knight of Clear Skies]

On 13/04/2021 at 08:48, PeterCPC said:

Can't you check in the FITS headers?

I'll take a look thanks.