I believe my 24-70mm Canon lens has developed lens fungus, which shows up against light areas at F22. A few months ago after walking in the cold to my club i lent the lens and camera for the night to another member to take shots of the portrait night.
Later he came back saying the images were all misty, it turned out it was condensationinside the lens. When i got it home i dried it out slowly at room temperature, today when we checked it has a spiderwork network of threads from the top of the lens, on checking it seems it has fungus a not uncommon problem.
Has anyone encountered this before ? how did you deal with it,and was it expensive to treat ? Any info gratefully received.
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regards brian.