Originally posted by Biro There'll be no change until one camera company tries it first... and meets with succcess. Then everyone else will jump in the pool and introduce near-identical cameras within 6 months. The conservatism of the camera industry is almost laughable.
Personally, I see no reason why a modern DSLR can't be the same size as a classic from the 1970s or 1980s. As for a modern "rangefinder," I agree a true rangefinder is really outdated technology. But a rangefinder alike (call it an EVIL if you like) with a built-in viewfinder - EVF or OVF is fine as long as it's good - would be warmly received. If Pentax unveiled one that took DA Limited primes it would be a winner.
Well, AFAIK there is a reason; the reason DSLRs are so chunky is that the sensor unit + SR unit + LCD is much thicker than just film and a pressure plate. The thinnest DSLR, if I recall correctly is the Olympus e410 at ~53mm, but the register distance is about 38mm, so there's ~15mm of electronics stuffed between the sensor and the back of the camera. There might be a way to make a retro DSLR though, but it would involve creating a new mount with a smaller mirror and a shorter register distance. Taking advantage of the size of the APS-C sensor, the register distance could be two- thirds of what it is now, theoretically. If the register distance could be gotten to ~30mm or so, then it would be feasible to stuff all those electronics into a 35mm-sized body.