Is there a standard size for DSLR Base Plate to Lens Axis?
Obviously a Canon 1D body, is bigger than the so called Prosumer bodies, but I am wondering if there is a standard dimension between a DSLR Base Plate to the centre of the lens? Actually, if the answer is yes, I need to know the dimension for Canon 1DX and 5DS bodies. I have digital calipers and can measure with 'reasonable' accuracy, but if there is a precise figure available, it would be better.
Actually, I just tried to measure it, and it is not that easy. I'd like to be better than ± 0.1mm
BTW I looked for the Photography forum to post this, but couldn't find it.

