Had my 70-200 in my bag for a few weeks, haven't really had the time to take much photos. My lens has never been dropped or abused and noticed this splitting crack in the body. It appears that there is a "casting" seam on both sides of the lens and this is where it's splitting. I've attached a photo of one side where the seam (yes it's hard to see) is still good and the other side where it's splitting.
and on a side note my newly acquired 17-50 the OS quit working. I should get my replacement 30mm 1.4 in tomorrow and I think on monday I will ship out all 3 with my 7D and have them calibrate everything and repair also but to my camera body. I'm thinking of ditching my 85mm and getting the sigma also and send all 4 lenses.
anyone ever send their body with the lens to sigma? any experience?
EDIT: The lens is still under 3 years of warranty. I had the OS unit in this same lens replaced about 5 months ago. All my sigmas have warranty.