Thanks Trevor,
I will certainly look this book up. Your ETA C image shows great detail. I need to read up on taking darks as it doesn't quite make sense why they need to mirror the image sub? I thought a dark was a dark but obviously not.
Regards Heath
Quote:
Originally Posted by TrevorW
Changing exposure time or ISO etc means you need to take corresponding darks so no benefit is gained from this on most targets.
Varying the exposure times is good for those objects which have a large dynamic range eg: Orion with the bright core or globulars where you wish to be able to show detail in the core.
Remember the more subs you catch the better, when I was shooting with a DSLR I used Jim Solomon's Cookbook as a guide, it's a good introductory tutorial to imaging with a DSLR
ps: look at the ETA C image I posted here 10 x 330s frames at ISO800 with a modified Canon 350d
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