This is the only shot I’ve ever taken with the combination of Canon 5D mkII and the Voigtlander f/1.1 lens at full aperture.

Since the lens is not compatible with a full frame sensor, I had to hold it by hand away from the camera to get the contacts of the nearby 50mm lens to be focused, especially since the plane of focus was so ridiculously infinitesimal (considering such wide aperture). After this photo I only used the lens (with an adapter) with the Sony NEX-5N.