07-13-2010, 01:45 PM
Hi Christos,
You're only using 40% of the total area covered by this lens on the 7D as compared to FF, and that is more or less the "good" area from my experience. Even then, to me it doesn't look convincing.
The two characteristics of this lens that are any good at all, IMO, is the fact that even at 12 mm straight lines are straight, and the price.
I expect this lens to behave less on FF. IMO, you're better off getting an 8-16 Sigma for APS-C, giving you 12.8 mm equivalent on APS-C rather than 12 on FF, but at quite a bit better quality (and probably usable on FF from about 13-14 mm as well).
Alternatively, if you don't mind manual focusing and manual aperture selection, are ok with 14 mm rather than 12, and a good amount of distortion, you could go for the Samyang 14 F/2.8, or for twice the price of the Sigma 12-24, the Nikkor 14-24 with G-EOS adapter.
If you want to do architectural photography, the only option is either the Sigma 12-24, at an IQ I do not recommend, or the Canon TS-E 17L, at a price.
HTH, kind regards, Wim
You're only using 40% of the total area covered by this lens on the 7D as compared to FF, and that is more or less the "good" area from my experience. Even then, to me it doesn't look convincing.
The two characteristics of this lens that are any good at all, IMO, is the fact that even at 12 mm straight lines are straight, and the price.
I expect this lens to behave less on FF. IMO, you're better off getting an 8-16 Sigma for APS-C, giving you 12.8 mm equivalent on APS-C rather than 12 on FF, but at quite a bit better quality (and probably usable on FF from about 13-14 mm as well).
Alternatively, if you don't mind manual focusing and manual aperture selection, are ok with 14 mm rather than 12, and a good amount of distortion, you could go for the Samyang 14 F/2.8, or for twice the price of the Sigma 12-24, the Nikkor 14-24 with G-EOS adapter.
If you want to do architectural photography, the only option is either the Sigma 12-24, at an IQ I do not recommend, or the Canon TS-E 17L, at a price.
HTH, kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....