Originally posted by Thagomizer I have that lens. I replaced a DA-L version with it so I could have Quick Shift. The DA-L was optically fine and so is the one Thagomizer and I have. The PLM is a bit better optically, and has better AF, but SWMBO has forbidden spending that kind of money for camera stuff for a while. I'll have to sneak it in at McBain in Lethbridge for pick up there and turn in my trade in and hope she doesn't notice the difference. On the other hand, there is replacing the M 400/5.6 with something with auto diaphragm control, you know, that cheapest of Pentax lenses, the 560 ... I think she might notice that, though.