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I'm not a regular in this board so I might be wrong here. Anyway, I own a Canon 17-55mm (the one that gathers a lot of dust within). So far I haven't done anything because I thought it didn't have an influence on quality. Lately though the dust amount is quite noticeable and I'm afraid it will eventually have an impact on the sharpness of the lens (which I'm quite happy with). I shoot 90% at f/5.6 and the remaining 10% at f/2.8
Question; is it worth it risking fucking up the lens while trying to open it for cleansing? I've seen some tutorials and seems quite easy but some guy started talking about having the lens uncalibrated afterwards or some shit like that...
