The problem with size on dSLRs is more due to control density. Compare the size of the K-5 and film MX:
The K-5 is narrower as it doesn't need to spool the film on both ends of the camera, but is taller and deeper.
The MX film camera was great to handle, but had simple, large controls that were easy to use.
The left fingers handles aperture and focus on the lens, the right handled shutter speed on a large dial and shutter release. Spacing and texture of the controls meant you could tell which was which, and work only the control you wanted.
But look at the K-5! It has many more controls, smaller dials and buttons spaced closely together. The right fingers handle shutter speed and aperture on tiny dials.
In addition, the back has an added array of buttons and stuff that sometimes also have to be used while taking a picture.
To make a small camera really handle well, the controls still need to be large, spaced well, and simplified. The Leica M9 retains the layout of a film camera for this reason. Yes, it has controls on the back, but most users still use it like a film camera, pre-setting the back controls for "film type" for a session, then only have to work the shutter speed, focus, aperture and release button when shooting.
This is why some of us would love a digital MX.
Last edited by TomB_tx; 01-28-2012 at 07:41 AM.