@
Na Horuk Thanks but I already tried cleaning the lens, back and front still no change.
@JinDesu Thanks for the sample images and I remember my lens used to be about as sharp as yours, the landscape image was from a few months ago and was sharp enough (considering it was taken while paragliding) I added a photo taken at f5 and f8 of a bookshelf to the dropbox folder and it's clearly not ok, can rain really do that much damage?
@manntax Thanks, any idea what's wrong with the lens? I thought cleaning it would solve the problem but I can't see any condensation or fungus on/in the lens and it's not exactly a big lens