With the shortest ever back-focus register distance for an interchangeable lens camera system on Earth, Pentax has made another big achievement with the assistance of Japanese accessory maker Rayqual, whom has made many Q-mount adaptors for various different lenses from C/D-mount to FD and then also one for K lenses of Pentax themselves:-http://homepage2.nifty.com/rayqual/PTX_Q.htmlvia 1001 Noisy
