Hi,
I'm trying my hand at Autoguided astro photography for the first time whilst the Autoguiding seems to work ok I'm a bit miffed as to whether it is best to shoot shorter exposures with high ISO or longer exposures with lower ISO
settings also is it better to use the incamera noise reduction or dark frames ?
The camera in question is a K100d Super ( I know, it's not a canon
)the attached image is a single frame shot at ISO 1600 60 sec exposure with incamera noise reduction, image has been resized and black level adjusted in photoshop It was only taken to test the Autoguiding and is rather grainy so the next step would be to take multiple and stack.
Thanks
Aprid