Originally Posted by FrozenInTime
I got the A7 because it allows me through various adapters to use any of my 70+ lenses (except 1 lens) on the A7. I have a Xenon 50mm 1.9 for my Robot Royal that won't fit).
The Heliar 40mm f2.8 and the VM-E adapter can be used on any E-mount body - not only the A7. It is also designed so that the lens can be collapsed on the adapter without damaging electronics or sensor of the camera.
I asked the lens designer to compare its performance to the Heliar 50mm f3.5 and he said that it was least equal to it, maybe even better!!!!!