The 17-85mm f4-5.6 has served me well, but I am just looking for something new now, and faster in low light conditions.
looking to upgrade to the Sigma 17-70 DC Macro OS HSM mainly because of the bigger apperature. the 15mm of lost lost zoom is fine with me as I never really used the full zoom on the 17-85.
is this lens sharp at f2.8? my canon was very sharp at 17mm and f4, I just want good quality. I mainly shoot automotive and landscape time to time.