By Junichi Date / CAPA asia
Phase-Detection AF of the α7RII works even with the EF lens mount adapter with electronic contacts
Compared to when the α7 Series went on sale, FE lenses have become quite full-featured. With the α7RII, it is now possible to use an A-mount lens equipped with SSM/SAM via LA-EA3 while using high-speed phase-detection AF, and the significance of using an EF lens via a mount adapter equipped with electronic contacts, has been considerably diminished. Nevertheless, there is a range which has still not been covered with genuine Sony lenses such as the EF11-24mm F4L USM, EF8-15mm F4L FISHEYE, EF400mm F2.8L IS II USM, TS-E17mm F2.8L, and TS-E24mm F3.5L II. This range can be covered by using Canon EF lenses and a mount adapter with electronic contacts.
In addition, AF is smoother than before because the phase-detection AF of the α7RII can be used even with an EF lens mount adapter equipped with electronic contacts. AF-C also works. For photographers who have mainly used Canon EOS so far, the combination of the α7RII and mount adapter with electronic contacts is an attractive option. The pixel count is smaller than the EOS5Ds/5Ds R, but the system has outstanding high-sensitivity characteristics due to the use of a backside illuminated CMOS sensor, and the in-body image stabilization works with any lens. Therefore, even with handheld shooting, it is possible to fully realize 42.3 million pixel, high-resolution optical performance.
Also, the system is equipped with an EVF which is easy to view at high magnification, so focusing with MF can be easily done outdoors, even without an overhead cloth. There is basically no price difference with the Canon EOS5Ds/5Ds R if the mount adapter is included, but considering that it is also possible to enjoy shooting 4K movies.
However, when a high-speed shutter is used with electronic front curtain shutter, uneven exposure still sometimes occurs at the top of the screen, even with an EF mount adapter with electronic contacts. This seems to be because the performance of genuine lenses has still not been completely emulated. If this sort of uneven exposure occurs during shooting, set electronic front curtain shutter to [Off].
Sony α7RII was awarded “Best Mirrorless CSC Professional” of the XXVI TIPA AWARDS (2016), and “Camera of the Year” of the Camera Grand Prix Japan 2016
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