10-05-2011, 05:15 PM
[quote name='Brightcolours' timestamp='1317807016' post='12106']
1. The 12-24mm version 1 was tested on APS-C only. The 12-24mm version 2 was tested both on APS-C and FF. Are you sure you are not comparing the version 1 APS-C test to the version 2 FF test? On APS-C the version 2 is only worse with barrel distortion, but even there it performs quite well. On sharpness and especially CA it does quite a bit better.
2. It can mean quality of assembly varies. So, buy one that you can return if it does show a big problem in centering. Same with the Tokina, by the way. The Tokina can accept filters (nice for gradual neutral density filters for instance, or ND filters or even a pol. filter) and is less vulnerable because you can use a sun hood. The Sigma 8-16mm goes quite a bit wider. The 12-24 has neither of these advantages.
[/quote]
Thank you very much for you reply!
1. So are you saying that although 12-24mm can be used for both APS-C and FF, the optical quality is only good on APS-C? It may leave the No.1 advantage of this lens pretty weak.
2. What about the overall optical quality on APS-C of 12-24 and 8-16? Do you know which one is better?
1. The 12-24mm version 1 was tested on APS-C only. The 12-24mm version 2 was tested both on APS-C and FF. Are you sure you are not comparing the version 1 APS-C test to the version 2 FF test? On APS-C the version 2 is only worse with barrel distortion, but even there it performs quite well. On sharpness and especially CA it does quite a bit better.
2. It can mean quality of assembly varies. So, buy one that you can return if it does show a big problem in centering. Same with the Tokina, by the way. The Tokina can accept filters (nice for gradual neutral density filters for instance, or ND filters or even a pol. filter) and is less vulnerable because you can use a sun hood. The Sigma 8-16mm goes quite a bit wider. The 12-24 has neither of these advantages.
[/quote]
Thank you very much for you reply!
1. So are you saying that although 12-24mm can be used for both APS-C and FF, the optical quality is only good on APS-C? It may leave the No.1 advantage of this lens pretty weak.
2. What about the overall optical quality on APS-C of 12-24 and 8-16? Do you know which one is better?