Originally posted by RioRico Have you tried focusing on fixed objects?
Not at infinity. The reason I picked the moon to test the infinity focus is because I couldn't find a good sharp object at true infinity. How far out do you have to go to reach the infinity focus point? I used a stable tripod for the moon shots. My K100D is also equipped with a split screen, which showed the moon as in focus with the focusing ring at the end of it's range. The screen should be properly calibrated, as I've used a focusing chart with a 50/1.4 lens at f1.4 and shims to calibrate it.
Originally posted by RioRico Luna does move rather quickly; your 'focus' problem may be blurring due to an over-long exposure, or to some tripod instability. Even 1/100 sec may be too slow a shutter with a long lens. Try shooting a phone pole or the like, with your camera and lens stabilized, and see if focus is the problem.
The tripod's very stable, so I don't think that's the issue. I've shot other subjects with it with no stability issues. Never thought of the shutter speed as a possible problem. I used exposure times of 1/10 to 1/30 sec. at ISO200. The moon was about a 45 degree angle overhead. it was a hot, muggy night, tho.
Is the mirror mount adjustment something I can do myself? If so, How?
Cheers,
Bobbo :-)