As the Sigma 85mm f/1.4 EX DG HSM was originally designed for Full-frame cameras, how would the performance be affected if I use it on Canon 60D (APS-C camera).
Q1) I need confirmation that this lens can be used on Canon 60D ?
Q2) In the Sigma official statements "When used on digital cameras with an APS-C size image sensor, the lens effectively becomes a 127.5mm F1.4 lens"
Can some kind soul here please explain to me in simple layman terms what does that mean?
ie instead of telling people that i have a 85MM Lens, now, I have a 127.5mm lens - can i tell people that i have a 127.5mm lens?
Q3) Will the perforamance of this lens suffer / be worse off since i am using a APS-C camera instead of a Full Frame Camera in which this lens was designed for?
Q4) Note! If the camera body does not support HSM, autofocus will not be available. Does Canon 60D have this function?
I am sorry that I have asked many questions but I do hope someone can please explain to me.