Jens Bladt a �crit :
Pentax K mount lenses are (as far as I recall by heart):
Older manual K-mount lenses are SMC:
K (or no letter) made for K1000, K2, KX etc M are made for MX, ME, Me Super, LX etc. M* are compact and light lenses (that's what it says in the small books, that came with the lenses) A have electrical contacts for communication with the camera body for viewfinder info shutter priority AE etc. made for Super A/Program and more A* are special or excellent pro quality lenses (as opposed to consumer lenses) F (made for the SF series - SFX, SF1, SF7 etc.) FA (made for Z and MZ series) FA* are special or excellent pro quality auto focus lenses (as opposed to consumer lenses) FAJ (made for the ist and *ist D) - they do not have an aperture ring.
http://www.bdimitrov.de/ can explain further and also explain the different
K-mounts etc.
And now, you must add DA: designed for Digital (small Aps sensor)
