capitaomorsa
Power Member
http://www.sigma-global.com/en/lenses/cas/product/index.html
30mm f1.4 APS-C
19mm f2.8 M4/3
30mm f2.8 M4/3
60mm f2.8 M4/3
30mm f1.4 APS-C
19mm f2.8 M4/3
30mm f2.8 M4/3
60mm f2.8 M4/3
Isso quer dizer que as "antigas" não eram testadas
We used to measure lens performance using conventional sensors. However, we’ve now developed our own A1 proprietary MTF (modulation transfer function) measuring system using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of our quality control inspections. The lenses in our new lines will all be checked using this new system before they are shipped.
[...]
every new lens designed in the Contemporary, Art, and Sports lines will be tested with the A1 device–meaning 100% of the lenses built will be analyzed and approved before leaving the factory in Aizu