Hello.…....
Its just 2mm that's all,but the wrong way 42mm instead of the EF 44mm.
Its such a pity as there are some real gems in the FD Lens range.
With the released of the EF mount they have all been made pretty
Much ignored. I suppose the m4/3 users can/are using them.
There were a few brave souls converting the choice FD lenses to EF
which meant an actual mount change on the lens and making redundant
The auto aperture mechanism.
This would allow the lens to mount directly onto the EOS camera with a 2mm
Loss in register distance. The only way around that was to 'shave' the mirror
Just in. The centre on the bottom edge to clear the rear element of the lens.
And pretty much the most popular lens that got converted was the 85mm f1.2