I read that for H-Alpha imaging of the sun, you advise the 290mm or the 174mm. Because of the pixel size, the 290 caught my attention. But it has a rolling shutter, where the 174 has a global shutter.
I allways thought that a global shutter was the way to go for solar H-Alpha high resolution imaging. Is that not true anymore? And is it safe to buy the 290 for this purpose?
Thanks in advance!
Bart.