優點:
AF fast
Quality of images is good
F/2.8 Is good for dim light
Sharp images
L lens quality
no missing focus
缺點:
heavy( but it is ok for men)
EXPENSIVE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
評價:
It is good
I love it very much
We can use extender2x that SSW cannot
After we add extender2x Good for snapshot birds , and the quality is still ok because it is L lens. haha