Sigma 24-70mm F2.8 EX DG Macro A-mount lens review by Sublimity
|Sublimity#9234 date: Jul-14-2011|
flare control: 4
|ownership:||I used to own this lens|
|compared to:||CZ 24-70|
|price paid:||400 CAD|
|positive:||Excellent on APS-C|
Good focusing speed
Good sharpness on APS-C
|negative:||Yellow and dull colors|
Corner sharpness is very bad on FF
|comment:||On APS-C, the Sigma 24-70 F2.8 EX DG Macro is an excellent performer. F2.8 is certainly usable and sharp from F4 and beyond.|
Focusing is fairly quick and build quality is good to very good. This lens is a good choice if you are considering a constant F2.8 zoom on the cheap for APS-C and require more reach than the ubiquitous Tamron 17-50 F2.8
Now for the bad.
On Full Frame, this lens shows its true colors (very dull, pun intended). Corner sharpness is very very bad and also suffers from heavy CA. The redeeming fact is that F4 in the center of the frame is still quite good but the edges are the exact opposite. Despite this critique, I still gave the sharpness rating a 4.5/5 because I believe this lens was intended for APS-C only under the generalization that FF users would be using high quality, more expensive lenses.
On both APS-C and FF, I would like to also comment on the color. They are, sadly, very dull and yellowish, especially at F2.8 where contrast is lacking. I used to think that the widely discussed relationship between lenses and image colors were overblown, until I used this lens.
In conclusion, I would highly recommend this lens for APS-C. Full frame users stay far far away.