Well Canon has managed somehow to screw with AF confirm chip-body comunication which means that no longer can you use m42 / other GREAT manual glass with adapters and AF confirm chips on new 5D mk3. You get ERROR 05 i think..
Now I WILL NOT buy MK3, I will buy MK2 instead or is there a way around that ?
edit by Nanomad: Language!
Some chips do work, so it's the manifacturer's fault for using wrong spoofed information ::)
e.g. Optix V5+ and V6 both work with the 5Dmk3 according to reports on the net
Thanks , I have v5+...will give it a try