Guy Mancuso
Administrator, Instructor
Man I love it when someone gets it. Well saidThere are many cameras doing the same, including my Canon 5d and 6d and the Olympus OMD. It is more or less standard to have AF tracking with continuous shooting set to low and focus on the first shot when CAF is activated with the high speed continuous shooting. Only high level pro camera tailored for action/sport will allow you focus tracking at high speed.
Now the whole question is how much fps you get in either low speed or high speed. 2.5 fps is pretty low and 4fps is often available as low speed. The OMD-E-M5II for instance has a high speed of about 10fps and low at 4fps or lower (customizable). But then the sensor is only offering 16MB. For a long time high end Canon and Nikon bodies came in two versions : one for resolution which was slower and one for action, much speedier, but with less resolution.
IMO it is irrealist to expect that a high resolution body like the A7RII will behave like an action camera, especially with adapted and older lenses.
It's a high resolution camera like a MF back that's it ultimate design is to produce at the highest level IQ not be the speed boat. It can't do both