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How do I make and use 'Flat Frames"
Posted: Tue Feb 13, 2018 10:41 pm
by rbenton
Forgive me if this topic has already been addressed, but I haven't been able to find it on my own here. I would appreciate it if anyone could point me to a thorough tutorial on how to make, and implement 'flat frames' when imaging full discs in Ha. If it helps, I have a Lunt LS100 w/DSII. I use FireCapture, and process my images using Autostakkert2, ImPPG, and Photoshop.
Thank you very much.
Randall Benton
Re: How do I make and use 'Flat Frames"
Posted: Wed Feb 14, 2018 9:44 am
by denababy
Hi there you can read an article by Alexandra Hart ( Montana), you will find it by going to ‘solarnutcase’ and follow until you reach ‘how to image the Sun’ or you can defocus on the whole disk then take a few frames as in Wise Imaging video on YouTube.
Re: How do I make and use 'Flat Frames"
Posted: Wed Feb 14, 2018 1:38 pm
by marktownley
Re: How do I make and use 'Flat Frames"
Posted: Wed Feb 14, 2018 5:50 pm
by Montana
Sometimes the easiest method when you have a full disc is to let the Sun drift during capture. This only works if you have room on the chip to drift, but any dust bunnies or newton's rings are then in different places and so are not stacked in the stacking software (as it will be tracking solar features and not the fixed features). This is the most simple technique and usually solves the issue in most cases.
Alexandra