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DSLR & Webcam imaging

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I've just been watching youtube videos and am now more confused than ever... Please can someone explain or point me to a guide as regards the difference between Dark / Bias / Flat frames and how to achieve these with both a DSLR (Nikon D5000) and a webcam? Thanks in advance

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Darks - Same exposure & ISO as your subs but lens cap on
Bias - highest exposure but same ISO Lens cap on

Flats - white / light (Tshirt) over the telescope
 

not sure why you need to take them with a web cam as normally they are used on planetary are high FPS video rates, not long exposures

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Just to add to Oldpink's post:

Darks, take them immediately after your lights because they are temperature dependent as far as the sensor is concerned

Bias, shortest exposure you can do on your camera e.g., 1/4000th second

Flats, as old pink says; just get your histogram peak about halfway

This applies to your DSLR to assist with processing of long exposure light frames.

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load DSS and then look at the help file, there's a section explains how to take the extra frames needed.....it on the first page near the bottom highlighted in Mauve

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