I recall a Pentax patent from a couple of years ago, that described a hybrid optical-digital viewfinder. (Kind of like the viewfinder in the Fuji X100, but for SLRs.)
What ever happened to this viewfinder? It seems like a brilliant idea, and one that Pentax could use in SLRs or in the Q system. Let me suggest some uses:
- Optical SLR viewfinder with superimposed level display (instead of on the back of the camera like now.)
- Optical SLR viewfinder with superimposed metering information (showing the light levels at all of the matrix meter locations around the frame)
- Optical SLR viewfinder with instantaneous image review IN THE VIEWFINDER. Chimp without ever lowering the camera or missing a shot.
- Optical SLR viewfinder with instantaneous electronic live-view and contrast-detect AF IN THE VIEWFINDER. I like using live-view and like the accuracy of focussing on the actual sensor image, but I don't always want to hold the camera away from my face.
- Optical viewfinder for the Q with digitally superimposed frame lines, allowing for use with zooms, different focal length primes, and for parallax correction.
- Optical viewfinder for the Q with simultaneous histogram overlay.
- Customizable viewfinder overlays for optical SLR or Q finders, allowing for grids, crop marks for different photo or movie aspect ratios
- Customizable viewfinder masks for SLR or Q -- say you want to shoot in square format, you could set the camera to capture that aspect ratio, and the digital overlay would black out (mask) the sides of the optical viewfinder to show the correct aspect ratio.