Along with the introduction of the Sigma 50-100mm f/1.8 DC HSM Art and Sigma 30mm f/1.4 DC DN Contemporary lenses, as well as the Sigma MC-11 converter, the Japanese manufacturer Sigma announced two innovations in the field of mirrorless cameras - Sigma sd Quattro and Sigma sd Quattro H.
The new MILC cameras Sigma sd Quattro and Sigma sd Quattro H are the same as far as their external appearance is concerned (their design is similar to the dp Quattro series - e.g. Sigma dp2 Quattro), with sealed and robust magnesium-alloy bodies, which are dust- and splash-proof; their rear sides are dominated by fixed LCD screens and built-in viewfinders (with 100% coverage and resolution of 2,300,000 dots); they are compatible with Sigma SA-mount lenses (Art, Contemporary, and Sport); and most importantly, they are equipped with Foveon Quattro sensors, but of different formats - the Sigma sd Quattro features an APS-C sensors, while the format of the sensor in the Sigma sd Quattro H is APS-H.
Furthermore, these mirrorless cameras boast a hybrid autofocus system that combines Phase Detection, which is in charge of focus speed, and Contrast Detection, where stress is on focus accuracy. Above all, they are driven by the latest Dual TRUE III processor.
As for the sensor, the one in the Sigma sd Quattro (APS-C), is identical to the one in the dp Quattro models (like in the case of the previously said dp2 Quattro, or the Sigma dp1 Quattro), with the dimensions 23.5 x 15.7 mm, and it also consists of several layers, the top of which encompasses 19.6MP, while the two remaining ones, underneath it, feature 4.9MP each. There is no low pass filter. These sensors produce images whose size and amount of details are equivalent to 39MP images produced by means of the standard Bayer-pattern sensor.
On the other hand, the APS-H sensor in the Sigma sd Quattro H, with its dimensions 26.6 x 17.9 mm, is around 30% larger than the said APS-C sensor, it is also multilayered (the upper layer consists of 25.5MP), and it can deliver images whose size and quality correspond to 51MP images made by using the standard Bayer-pattern sensor.
When it comes to the pricing and availability of the new Sigma sd Quattro and Sigma sd Quattro H mirrorless cameras, these details are yet to be announced.
The news was taken from SIGMA.