Have to agree with Doug here. The camera generates very little dark current, so little in fact I often don't bother with dark frames (flats yes due to dirty glass
![Big Grin](/vbiis/images/smilies/happy04.gif)
). Marc I have never had a dark frame look like that in nearly two years of owning a QHY8. Perhaps you streched it so much it ripped in two
![Poke Toungue Out](/vbiis/images/smilies/tongue05.gif)
.
Mark