Mirrorless Cameras and Continuous AF
Posted: Mon 20 Oct 2014, 08:24
As those who follow the forum will know, for a while now I have been using m43 cameras for general purpose work as I find them more convenient to carry around than a DSLR. I am not alone in wanting to use lighter cameras and Joe Cornish, for one, now shoots on Sony A7Rs in place of the medium format gear he used to carry; he reckons it results in a weight saving of 10 kg. Mirrorless does have an achilles heel when it comes to continuous AF and quite simply most systems are not up to the job. This was one of the issues I had with the Olympus E-M1 when I tried it over a weekend recently. It has both contrast and phase AF systems, with the latter being used to improve continuous AF performance, but I did not find that it worked well, especially with subjects moving quickly across the frame. Imaging Resource found the same when it tried out the new Olympus 40-150 f/2.8 lens, which is a pity since the reviews I have seen indicate that this is a first class optic whose use will be limited by the cameras on which it will be currently mounted.
http://www.imaging-resource.com/news/20 ... er-a-pro-q
http://www.imaging-resource.com/news/20 ... er-a-pro-q