Originally Posted by
Thlayle
I still think the tripod and head need to be replaced, but seeing the results at times, by others and myself on rare occasion, with this lens, taking just quick handheld shots, I really am starting to suspect the lens itself. I still have to do some systematic testing, as Dan suggests, but I'm using quite a bit just lately and I am noticing it sometimes just will not even appear in focus in the viewfinder AND at times the lens seems to 'rattle' which seems to me that it is 'focus hunting' --just not zeroing in & staying on a focus point(s).
I am taking it on a trip with me and will be working it some more, but am not optimistic about any better results, and I won't have a chance for a few weeks to do testing of the focusing.
ALSO -- I have, when recently beginning to try to do. some testing of it, placed the camera with this lens on a very solid, stable surface, waited still for some time to minimize the possibility of vibrations, and then when looking at a subject in live view --everything seems to be floating, never staying still. What is up with that? Is this normal?