looking at:
Sigma 12-24mm f/4.5-5.6 EX DG HSM Aspherical
and
Sigma 10-20mm f/4-5.6 EX DC HSM
any opinions on these?
I want something wider. Only concern is the both lens are around f/4 at their widest.. my current lens does 3.5 at 18mm, but i'm guessing these won't.
the 12-24 is aspherical, which is handy. what are sigma optics like compared to nikkor?
Sigma 12-24mm f/4.5-5.6 EX DG HSM Aspherical
and
Sigma 10-20mm f/4-5.6 EX DC HSM
any opinions on these?
I want something wider. Only concern is the both lens are around f/4 at their widest.. my current lens does 3.5 at 18mm, but i'm guessing these won't.
the 12-24 is aspherical, which is handy. what are sigma optics like compared to nikkor?