06-04-2010, 11:27 AM
The new Sigma with HSM is a DIFFERENT lens with a new optical design. So as such, it is not so interesting how the old version does.
[quote name='toni-a' date='04 June 2010 - 10:38 AM' timestamp='1275644293' post='193']
Sigma 17-70 isn't made for 5D, forget about it.
Had the Sigma 24-70f2.8 DG macro, I used it on 30D.
An excellent lens,had two samples, on first one had focus problems, it was replaced the new lens AF was fast and precise but very noisy, I remember it was as loud as the camera shutter noise, once I was shooting a baby the focus engine sound woke him up.No more problems in low light than I have with other f2.8 lenses.
The lens is very sharp even at f2.8 contrast is nice, sometimes you have the typical sigma yellow, but this is nothing to worry about.
Its cons: big and heavy, 82mm expensive filters, it has a focus clutch=two buttons to push when going from AF to MF, fragile: I broke two of this lens into pieces, but I don't think this will happen to you, just don't drop it.
all in all, I think optically it is as good as Canon 24-70L, just make sure you have a good sample, there are some mechanical shortcomings, but you can live with them <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />
[/quote]
[quote name='toni-a' date='04 June 2010 - 10:38 AM' timestamp='1275644293' post='193']
Sigma 17-70 isn't made for 5D, forget about it.
Had the Sigma 24-70f2.8 DG macro, I used it on 30D.
An excellent lens,had two samples, on first one had focus problems, it was replaced the new lens AF was fast and precise but very noisy, I remember it was as loud as the camera shutter noise, once I was shooting a baby the focus engine sound woke him up.No more problems in low light than I have with other f2.8 lenses.
The lens is very sharp even at f2.8 contrast is nice, sometimes you have the typical sigma yellow, but this is nothing to worry about.
Its cons: big and heavy, 82mm expensive filters, it has a focus clutch=two buttons to push when going from AF to MF, fragile: I broke two of this lens into pieces, but I don't think this will happen to you, just don't drop it.
all in all, I think optically it is as good as Canon 24-70L, just make sure you have a good sample, there are some mechanical shortcomings, but you can live with them <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />[/quote]