Interesting George, none of my unmodified tick mark samples of the 10.5 or the 5cm fit on my Df.
gbohannon wrote: saph wrote:
The rear mount on those very early lenses (tick mark and a bit later) is too deep. Of course those historic lenses should really not be cut up or have their aperture rings swapped.
May be variances in that. My tick mark 5cm fits. It is close but it fits without the aperture ring rubbing. I am sure it is not modified. The aperture ring screws on so there is some room for clearance depending on how it is installed. Realized that when I disassembled it for cleaning.
