Frankie
Speaking Frankly
Blasphemy, I know, but composition is important in my photography, which is why I don't like the approximation of a rangefinder's parallax error.
But perhaps there's a way to overlap a live-view electronic finder's display into the center portion of an secondary optical viewfinder, using a prism, so that you get the exact image framing from the electronic live display, combined with the live view of the surrounding non-image area from the optical finder. The best of both worlds. The live view electronic display would be mounted within the side of the optical finder, with a prism inside that overlaps its display onto the optical finder's image. The optical display itself would have a blacked out central portion where the electronic display is overlapped onto via the prism. So you end up seeing a live EVF display in the central (say, 2/3rd's) portion of the viewfinder, with a live optical view surrounding it.
Focusing would be autofocus with manual assist, like the u4/3 G1's, rather than using a mechanically coupled rangefinder. This frees up the possibility of adapting legacy lenses, but without the problems of loose rangefinder cam tolerances, and also permits a new line of autofocus lenses optimized for the digital sensor.
The best of both worlds: a real optical viewfinder, with the accuracy of composition from an EVF, and able to see the area outside the image-taking region, without the mechanical tolerance problems (and cost) of a mechanically coupled rangefinder.
BTW, for those who haven't tried it, focusing the G1's EVF is a cinch; the image snaps into sharp focus without the need for a split-image prism, or rangefinder's double image. Applying this type of display to the hybrid display mentioned above would be entirely practical.
~Joe
I had the opportunity of playing, freely, with the GH1, GF1/EVF and EP1/optical, side by side and one after another in a Tokyo camera super-mart last fall.
The EP1/optical is still best, albeit no manual focusing possible [rejected].
The GF1/EVF is not good enough [resolution too low, as if I am seeing a coarse ground glass].
The GH1 [G1] I would totally accept...us aging yuppies with maturing eye sights [but have money to buy toys].
I have long opined that a future RF is not necessarily even the best of Zeiss ZM, it will be EVIL.
Blasphemy.