I hope hindi off-topic regarding Sigma 24-70mm f2.8 ex dg hsm version pwede ba siya sa Nikon D3100? planning to purchase kasi mag-autofocus pa din ba siya?
Yes this lens will auto focus with your D3100. With Sigma lenses, look for the words hsm
in the Sigma model name, this means it has Hyper Sonic Motor ( built in motor ).
-- edited by RHEDD on Aug 27 2014, 08:11 AM