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should flats b taken at the same iso speed of the light frames and does anyone no a good rule of thumb on how many to use for the best results

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Comment by spike77 on January 15, 2011 at 3:15pm
i wonder if u put to many would u start wipeing away data hum ?
Comment by Charles Dunlop on January 11, 2011 at 7:37pm
I do thirty per color channe,
Comment by spike77 on January 7, 2011 at 2:36pm
wow mark thanks for the info man wasent exspecting that much info and u nailed it thanks buddy i was doing my flats at the lowest iso speed of the camera and was haveing to use a whole bunch of them to get the big white blob off the image gonna reshoot them and apply new flats and c what we can come up with
Comment by Marc Basti on January 4, 2011 at 4:16pm
Technically, they don't have to be, but DSS as a stacking program wants them that way. I usually shoot 20-25 frames. There is a good "How To" in DSS under FAQ. I put a link to it in the Tutorials discussions group. That's funny Spike, if it's clear tomorrow I need to shoot a new run of flats for the field flattener I got. One of these days I'd like to get one of those light foils, errrr more money please. Marc

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