steve's reviews

Sigma 17-70mm f/2.8-4 DC Macro OS HSM

Great image quality very good resolving ability zero aberration .I work in the camera industry and i tested this out my self with focus charts mirror lock up self timer 2.8 to f7.1 very little modulation ,did not double halo on the edges at 17mm not many other lenses can do this ,i use a canon 7D and this lens is very very good over all .i was able to stack a cir pol on a 8 x ND filter and retain auto focus .The 1:2 macro is just a bonus.Every D7000 nikon i sold went out the door with this lens as well this year i think the 18-105 is not suited for the camera.