Quote:
Originally Posted by Hagar
Greg, I also use one of Pete's (EXFSO) light boxes with a variable light output. I use it to get good exposure time and suitable ADU limits that I am after(20000). The glory of this system is flats can be taken each session and time is no longer a problem. The variable light output is a wonderful addition to a great light box.
I also shoot bias frames or darks and put them together as you do in CCDStack.
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Yes, light boxes are better than sky flats imo too. Why do you dither flats?, no need to with a light box. You can set the light box up in a set place and set the mount "park" to it, that way you can automate flats if need be. In my experience, sky flats are dodgy, you run out of time (min 10 each filter really), you have to iether automate them for exactly the right time or be there at an awkward time manually, and then clouds appear after a clear image run.
I use guider only dithering whilst autoguiding, works well.
If your optical train is uniform and clean (no dust donuts), you can use a flat library for each filter, even if you change the cam rotation, ive seen that way, but your opticals must be uniform and clean.