我睇2個MTF網都係S末段濕D,前段差不多...
manman1998 發表於 2017-1-24 23:23 
http://www.lenstip.com/434.11-Le ... OS_HSM_Summary.html
For instance the Tamron is sharper at the longer end of the focal scale in the frame centre but the Sigma performs better on the edge of the APS-C sensor and full frame |