Sony a7 crop mode

[kumir]

The new Alpha a7 models feature a new FE lens mount, and Sony introduced five FE-mount lenses with the cameras: the 28-70mm ƒ/3.5-5.6 OSS and 70-200mm ƒ/4 G zooms, and Carl Zeiss Sonnar T* 55mm ƒ/1.8 ZA, Sonnar T* 35mm ƒ/2.8 ZA and Vario-Tessar T* 24-70mm ƒ/4 ZA OSS. You can also use existing Sony A- and E-mount lenses, via adapters.

Regular Sony E-mount lenses were designed for the NEX cameras, which feature smaller APS-C sensors, so they'll vignette if used in full-frame mode on the new a7 cameras, but can be used (via adapter) in APS-C mode. Full-frame Sony A-mount DSLR lenses (and legacy Konica Minolta Maxxum lenses) can be used, also via adapter. When used with the LA-EA2 or LA-EA4 adapters, you get phase-detection AF via the Translucent Mirror Technology AF system in the adapter. Sony DT A-mount lenses were designed for APS-C sensors, and like the E-mount lenses, will vignette if used in full-frame mode on the a7 cameras. But the cameras will automatically switch to APS-C crop when such a lens is attached (or you can make the switch manually with any lens). In crop mode, there's a 1.5X crop factor, and image sizes drop to 10 (a7) and 15 (a7R) megapixels, respectively.