I'm reasonably experienced with the good 'ol SLR camera (and DSLR) but there's one thing that is bugging me more and more with my Canon. Not having the lens stop at infinity.
I understand why this is not possible with the new lenses - temperature variations having an effect on the modern fancy optics, but, really - it's a pain!
I just got my prints back of my McNaught images. Most are perfect but there's one shot (the best of course) which at 80cm x 50cm print size it is obvious when viewing up close that the stars are slightly out of focus. Disappointing to put it mildly!
For normal astro photography I focus using DSLRFocus - no problem there.
For most of my McNaught images I zoomed in on Venus, focused, then zoomed out and re-framed for the comet (my lenses are parfocal across all zoom range).
But on this one occasion Venus had set, and being my 17-40mm lens, focusing on any of the bright stars that were visible was very hard - they were so small.
I would often take a shot, view it, zoom in and check the focus - time consuming and I didn't have time on this occasion.
I realised then also how small the image physically is in my 350D vs my old Pentax SP1000, not helping the situation. (I wonder if the more expensive Canon's have larger physical image size to view?)
Any advice for these situations where you don't have a bright Venus or Sirius to focus on, and are not hooked up to a computer to focus using DSLR Focus??
It's really got me now that it's ruined the chance of me printing one of my shots to 80cm