Many beginning astrophotographers are confused about how long each of their subexposures should be. I know that was true for me!
There is a lot of good information on the net but I wasn’t aware of anything that covered the process from beginning to end so this video does just that.
This is what it covers:
- 1. The formula for optimal exposure level
- 2. The range from minimally acceptable to optimally good exposure levels
- 3. How to measure the parameters of your camera
- 4. How to estimate when you can’t perform the measurements (perhaps you are considering buying a camera and want to see how it would compare to your current camera).
- 5. How to evaluate your individual subs for exposure and clipping in PixInsight
- 6. How to evaluate your subs in Sequence Generator Pro
Here is the link to Jon Rista’s post on Cloudy Nights: https://www.cloudynights.com/topic/597682-i-need-a-primer-on-read-noise-calc-asi1600/#entry8200280
Here is the link to the page where you can find the 2DPlot script as well as many other useful PixInsight scripts: http://www.skypixels.at/pixinsight_scripts.html.
This video doesn’t get into theory but concentrates on practice. I hope this is helpful. If there is anything that isn’t clear or you find a mistake, please let me know.
ERRATA: When I discuss the scaling from the camera bit depth to 16 bits, I erroneously said the scaling was 8 for the ASI294 when it is actually 4. Proof something three times and I still don’t catch an error until it is out the door…