Earlier today, I posted the results of a test of the maximum synch speed of the Sony a7RII with both EFCS on and EFCS off. It appeared that the camera’s true synch speed was 1/200 second in both modes.
That got me wondering. Would the D810, with a specified synch speed of 1/320 second, fare about the same?
I put an AF-S 85mm f/1.4 Nikon G lens on a D810, and aimed the camera at a white wall in manual exposure mode and the aperture set to f/11. I connected the hot shoe directly (all copper, no IR or radio synch) to a Paul Buff Einstein and set the flash for a full 640 watt-second dump. I made exposures at 1/400, 1/320, and 1/250, with EFCS on and off.
About the same margin in both cases.
Just like the a7RII, the camera doesn’t quite meet its spec.
Cutting the camera a camera a little slack results in a nicely exposed image.
I have to ask myself, after being zero for two in finding a camera that meets its max synch speed spec, if there’s something wrong with my test. Yes, there is. For the answer look here.