Sigma plans to produce a full-frame mirrorless camera based around its unique Foveon technology. So far, the largest Foveon sensor is APS-H, which is found in the 51MP SD Quattro H mirrorless camera.
If you've never heard of Foveon before, it works by interpreting color by capturing light at three different depths. We've found that the sensor design is capable of delivering lovely color and detail at lower sensitivities, but struggles with noise at higher sensitivities, so hopefully the larger sensor will improve on this.
Not only is Sigma developing a full-frame Foveon sensor, but, following on from its announcement of a partnership with Leica and Panasonic, its new full-frame camera will use the L-Mount, with no more cameras from Sigma featuring its own SA mount.
If you're one of the few photographers who has a collection of SA mount lenses and wants the new camera when it arrives in 2019, Sigma will be able to convert some SA mount lenses over to L-Mount, while the company will also be offering a SA to L-Mount adapter.
Canon EF to L-Mount adapter
Sigma is also developing a Canon EF to L-Mount adapter that will enable Canon shooters to use their EF lenses not just on Sigma's new full-frame mirrorless camera, but also on Panasonic's new Lumix S1R and S1 full-frame mirrorless cameras, as well as Leica's L-Mount cameras.
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