Flats - how ??

[beamish]

How are you supposed to go about taking flats ?? ie do you expose for the same length as your lights & darks ??

Ta, Karlo

[ottUp]

No, you just expose long enough to get an even gray where your pixels are saturated to 30-50% of their fully bright value. How long that is depends on your source of flat gray light, camera, filters, etc. For me it's between 0.5 and 5 seconds with various combinations of gear.

- Richard

[jgs001]

Karlo, the DSS help suggests putting the camera in Av mode and letting it work out the correct exposure. In most cases it puts the histogram on the 80% bar on the right of the frame (if that makes sense). Seems to work well.

[beamish]

Cheers chaps.

karlo