Looks like a real beauty

PENTAX,  a very popular brand in the days of SLR's, is now once again a player in the major field of photography. The Pentax 645 is what is known as a medium format camera. This term is really misleading since in the digital age this should be known as large format. In view of the fact that there has been so much improvement in sensors and the old 24X36mm or old 35 mm format and it has now reached the 40 mega pixel range, the future of medium format digital is rather tenuous. Nevertheless, these cameras have a great appeal for studio use. So this beauty of a lens should please it's fans.

smc PENTAX-DA645 25mm F4AL [IF] SDM AW