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DSLR data calibration without darks
Thank you for your question and welcome to the APP forum. My apologies for the delay in my response.
If you want to calibrate DSLR data without darks, you will need to use at least a masterbias if you are using flats as well. Are you?
(The hotpixels can be taken care of most efficiently by making a one-time BPM from a simple set of darks.)
Main developer of Astro Pixel Processor and owner of Aries Productions
So, can someone please clarify the exact workflow of DSLR calibration without darks?
I normally calibrate with darks, flats, bias and bpm. Do I just leave the darks selection empty, or load my bias in there?
Also, do i have to dither? And which checkboxes do I need to select?
Ok a number of questions here, some general advice;
- Always use darks when you have amp-glow, if not and you still want to remove bad-pixels, you will need at least a BPM (Bad Pixel Map) and you can leave the darks empty.
- Dithering is always advised as it removes any fixed pattern noise that might still be present and will therefore always improve your result. If you're under-sampling, dithering is even required to perform drizzling if you want that.
Dithering is done during the taking of photo's, no checkboxes needed in APP.
Ah yes, backlash is fun isn't it. I wanted all of this to work nicely each time, so I even took apart my AZ-EQ6 and relubricated everything + changed some components. Got a nice feeling out of that for finetuning such a mount which is nice. It makes dithering and proper guiding work at least more stable. Good luck with it!