Was going to post my old (bought 2 years ago) Sigma 50 f1.4 EX DG for sale on the AP site so I decided I'd clean it up a bit for photos. Turned it over,took off the UV filter & saw what I first thought was a speck of dust inside BUT on further inspection it is actually fungus. I pride myself on taking care of my gear so this is quite a surprise. It has lived in a bright sunny room all its life so go figure eh? So is there a way for me to rid the lens of this foul beast or is it off to the shop & if that's the case can anyone recommend a good tech.