With all this talk about EVILs and registration distances I have a question. This may or may not unveil me to be incredibly ignorant about optical design but I don't care!
Would it be theoretically possible to design a lens for, say 20mm registration distance, which is perfectly compatible with the K-mount's ~45mm registration distance? i.e. a lens which can achieve infinity focus across two different reg distances?
I ask because I wanted to know if Pentax could make a full sized (diameter wise) K-mount EVIL with a short reg distance but make a lens which is compatible both with the EVIL and with the original K-mount as well. Obviously you'd have issues to consider with field of view etc, offset lenses and so on.
I've put this in lens discussion because I wanted to know if this was physically possible rather than discuss it's rumourish potential!
I am guessing it isn't. Or if it is it would be very complicated and not worthwhile.