Originally posted by ismaelg This could be a case like most aircraft accidents, where there is no single cause but a combination of causes.
Excellent analogy! And spot-on, I think.
Originally posted by newarts Put the camera on a tripod or sit it on a stool or something so you are not holding it when a shot is taken - use the 2 or 10 second delay to shoot the photo. This will clarify if your holding technique is an issue.
Of course I neglected to suggest that...
That's how I figured out my technique had slipped - I took some tripod shots for some reason and thought, "Hey, this lens isn't as crappy as I thought!" Then realised what that meant...