Quote:
Originally Posted by Jon
Pat, the advice you've had is very technical and spot on, AFAIK.
But there's a biggie here: it's never too late to get your dark fames. As far as I can see, no one has addressed the fact that you haven't added dark frames.
Take some (e.g maybe 20) exposures at the same ISO and the same duration as your lights. Leave the lens cap on the camera: you can take them anywhere, anytime. The point is, you are capturing a record of the way the pixels in your sensor heat up and create noise while your lights are exposing. These are your darks.
Your stacking program will then "subtract" this heat-generated noise from your light frames. This makes a *huge* difference. The good news is, you can capture these dark frames anytime.
Try this and let's see yor results. I think your image is amazing given there were no darks; well done!
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thanks again jon
does your camera need to stay at prime focus for darks and flats and also the same focus?
pat