Orion was a jerk...he made this lovely nebula that's so hard to process!!!
Anyway, I'm having a problem with dust. I attached this shot to give an idea, higher resolution is at
http://www.flickr.com/photos/skyslab...69026/sizes/h/ . Every time I try to clean the filters and other components, I just get more dust settling on them to the point that my latest shots are literally polluted.
Does anyone have any tips on how you stop this?
Next noob question - We get nice pictures by stacking a processing, got it - but why? Conceptually if I take a 30 minute shot and then another and another etc etc, Aren't I just going to get the same information over and over again? Why wouldn't I just take the one shot I've done and stack it many times over? Is this a case of getting subtly different bits of information from time to time or am I missing something?
Anyway, help & advice would be welcome.
Thanks
Simon.