Hi there!
How can I rotate a SER-file by 90 degrees. I didn't find any suitable program so far.
I use an Atair 178MM cam with my LHIRESIII for spectroheliography to capture the H alpha line. In order to use the full length of the chip I positioned the line horizontally. But unfortunately the used software wants it in the perpendicular position.
Thanks for any hints.
Jörg!