Originally posted by FrankC Since the problem resolves itself at f/8, then my guess is that your lens has an element or two out of alignment.
You could be right, the lens shows signs of having been messed with... that could explain both issues in one go.
Originally posted by Lowell Goudge also you say it does not infinity focus properly, is the shot you took at infinity? what about closer. maybe it is just the infinity focus issue getting you
Hi Lowell, the pic was at about 50', I was focussing with live view, next time I'l note the focus distance reading off the ring but in any case I was comfortably short of rotating the focus to infinity
Originally posted by MysteryOnion s the front elements loose?
nope
---------- Post added 3rd Mar 2014 at 19:57 ----------
I'm going to try turning around the second element. its double concave (according to the optical diagram in the reviews) so easy to replace the wrong way round.
UPDATE: AHA!! Second element was loose. Focussing across the room with my G1 already looks a lot better. Test properly tomorrow.