[hotspur (Chris)]

I have a external power supply being made for my Canon 450D-this what I will use for my astronomy photography,on the scope and wide field lens from now on.

I have started using Deep Sky stacker.What is the most regular time span used for doing such projects? I see people mentioning 2 minutes to 5 minutes for the regular type images I am looking at trying to do.

I do not think I will do anything more complicated in astro images,these flats people talk about,is that only if you have a' field flattener' for your scope? Which I heard is rather voodoo to get the exact right one for ones particlular scope.

I think I will mainly focusing on wider field imaging with the 10-22 mm lens,I did a 14 minute single exp of milky way in July,and it got a lot of favourable comment from different groups of people.So stacking lots of images of a smaller time frame would produce better results.

what is the best time frame for subs doing wide field?

Thanks for any advice-Chris