VC works well if you are shooting with handhold. With tripod, somehow it also works when shooting during the daytime but definitely it has to be switched off if shooting at low light....Well, some may say that as long as it is on tripod, VC should be 'OFF' as advocate by manuals, professional magazines etc....BUT no harm trying to shoot some photos during daytime, zoom in and see for yourself and let me know...By the way, enable mirror lock and use at least 2 sec timer to eliminate residue shake...