Originally posted by ElJamoquio The only problem I have with it is that there's only 9 (10 if you count 0) digits to use, so then you have to use another naming convention anyway (K-5 becomes K-5II, 5D becomes 5D-Mark III, etc). You can't use K-7 again for quite some time, too.
Everyone's used to the 'higher numbers means less features', and the roman numeral stuff, so Pentax is following the herd.
I've been thinking about that, but why can't they use K-7 II or something like that, to differentiate from the old K-7. And when they get to 10, they could just name its successor K-11. They won't get into trouble until they reach 30 (K10D and K20D are a different naming convention, without the "-" and with the "D").
If they want to make a really future-proof naming system, they would have to let the numbers just represent the generation, not the camera level. But by the time they get to the K-29/290/2900, the world will probably have changed anyway, beyond what we can imagine right now.
edit: or... we got it all wrong and the 5 indicates APS-C format or something, with successors getting the 5.1, 51 and 510 numericals.