Greetings A question for all those who've compared AF-I/AFS/Sigma HSM drives on both the F90X and F5........ I was wondering if the limiting factor in AF speed for lenses with built in motors is entirely dependent on the internal motor capability or whether the camera is still part of the equation. I recently bought a Sigma 70-200f2.8 HSM for use with my F90X. Would the HSM focus any faster on an F5/F100 ie is the speed of the motor affected by the camera ? (Ignoring the effect of hunting - I realise that the focus software improvements with the F5/F100 will result in a somewhat quicker lock-on for "difficult" subjects!) Bottom line is really - will I be better off upgrading to the F5 purely in terms of AF speed with the HSM lens? Thanks in advance for ideas! Regards Anthony [EMAIL PROTECTED]
