Originally posted by shaolen I'm aware of the mirror box. I'm not saying to make them the size of the MILCs but the size of film SLRs (which have the same mirror box). I feel like this thickness should be possible yet no one has done it yet. Especially when we look at how thin cell phones are.
So your baseline is a cell phone camera? That is a very strange comparison.
Cell phone camera sensors are tiny.. TINY. As a result, the performance is affected negatively compared to an SLR. But the main issue, already shown in the graphic, is the OVF mirrorbox and register distance that HAS to be there for K mount.
The cell phone is without a mirrorbox. If your cellphone had a mirrorbox and K mount ring it would be the size of a Pentax K mount camera.
Besides, you're attaching a long tube (camera lens) to the end of it. Can you imagine attaching a 60-250 f/4 or other large sized lens (even the DAL 18-55 for that matter) to something as thin as your cellphone? The handling would be all wrong. You want a thick base to grip with all of that weight on the front of your camera. It makes little sense to shrink the body size as long as the lens size (and weight) remains large.