PLs advise. Trying to use a old sigma lens 28-70 f2.8-4 UC zoom on my 350D. Work fine when i zoom and focus but the min i take the 1st shot it gor struck and my camera show error 99.
I try to off and take out batt and try still cannot work (same error 99)
Take out batt and lens to clean the contact point still give error 99.
Does it mean this ol sigma len cannot be use on 350d at all?
Anyone can help??