More Sigma 24-70 Art review for your Friday:
http://www.lenstip.com/index.php?test=obiektywu&test_ob=507
Shorter FLs were sharper, 70mm it fell off a bit
Center of frame: better than the various 24-70 2.8 IS lenses (Nikon and Tamron), but worse than the 24-70 f/2.8L II
Outskirts of frame: Not stellar wide open, not terrible. Stopping down helps, of course.
AF is a good but not great result:
"The accuracy performance we assess positively, both in the studio and outdoor. For the most difficult combination of the 70 mm focal length and f/2.8 aperture, with the lens positioned before a testing chart, you might count on 88% of hits accurate within just 5% of difference from the best result. A bit worse hits but still completely acceptable (from 5 to 10% of difference from the best result) constituted 7% of all shots.There were 5% of shots considered by us to be totally missfocused (different by more than 20% from the sharpest photo). The results at the shorter end of the focal spectrum were even better due to the increase of the depth of field."
Before people freak out at a "totally misfocused 5%", see the caveats above. In the last year or so they have raised the bar on what they consider a miss. Also, their test camera is not the latest and greatest but is no slouch whatsoever -- it's a 5D3.
- A
http://www.lenstip.com/index.php?test=obiektywu&test_ob=507
Shorter FLs were sharper, 70mm it fell off a bit
Center of frame: better than the various 24-70 2.8 IS lenses (Nikon and Tamron), but worse than the 24-70 f/2.8L II
Outskirts of frame: Not stellar wide open, not terrible. Stopping down helps, of course.
AF is a good but not great result:
"The accuracy performance we assess positively, both in the studio and outdoor. For the most difficult combination of the 70 mm focal length and f/2.8 aperture, with the lens positioned before a testing chart, you might count on 88% of hits accurate within just 5% of difference from the best result. A bit worse hits but still completely acceptable (from 5 to 10% of difference from the best result) constituted 7% of all shots.There were 5% of shots considered by us to be totally missfocused (different by more than 20% from the sharpest photo). The results at the shorter end of the focal spectrum were even better due to the increase of the depth of field."
Before people freak out at a "totally misfocused 5%", see the caveats above. In the last year or so they have raised the bar on what they consider a miss. Also, their test camera is not the latest and greatest but is no slouch whatsoever -- it's a 5D3.
- A