True Terry, and I suspect a lot of the resistance to electronic viewfinders from many people is based on a squint through an older bridge camera or something, and they were dire. The new Sony A7's EVF for example is damn good, maybe not preferable to optical in all situations, but getting so close, and they have several other genuine advantages.
Has Sony given up on the translucent mirror thing? I thought that was worth pursuing
Rumour mill says Sony will be launching a new APS-C A-series SLT body in a month or so, so it seems not.
Whether you mean professional, or better... or whether you think they mean the same thing... there definitely IS an advantage to having a mirror. It's called a bright, crisp, 100% optical viewfider. Silly LCD screens absolutely suck in so many ways. Sorry... its for this reason alone I've never bothered with mirrorless cameras, no matter how appealing the other features are. In this regard, mirrorless absolutely sucks the big one!
I've just sat down with a selection of the 35mm SLRs I have to hand in my living room, along with my A7. The A7's finder is XGA resolution (1024 x 768) which is enough to form a reasonable judgement of an image (it's the 'Large' size on Flickr) and it has decent colour.
Ranking them in order of my pleasure using them, taking into account brightness and crispness in a room with the dimmer down about half (EV 4: f/2.8, 0.5 sec, ISO 100)
Olympus OM-2n with Zuiko 50mm f/1.8
Canon T90 with FDn 50mm f/1.4
Canon EF with FDn 50mm f/1.4
Sony A7 with FDn 50mm f/1.4
Yashica Super FX 3000 with ML 50mm f/1.9
The OM is pretty much the gold standard for 35mm SLR OVFs.
The Canons have an advantage of an f/1.4 lens, while the Yashica suffers with a 1.9 and it's by far the cheapest body of the lot and it does have a small and gloomy finder, at least relative to the OM-2.
Unfortunately I don't have my 5Dc here, but I reckon it slots in between the A7 and the EF.
Swapping out the ML50 for a Contax Zeiss 50mm f/1.7 improves the Yashica a little, putting it just back ahead of the A7.
Now, what is truly interesting, and something that I hadn't appreciated until I conducted this little exercise, is that if I wander down to the unlit other end of the living room, where there is very little light indeed (EV 0 to EV 1: 4 sec, f/2.8, ISO 100) the A7 is suddenly much the easiest of them all to work with. It's far brighter and clearer than even the OM-2n. The OM finder may have more detail in theory, but I can't see it.
With the A7 I can focus on a specific book or DVD title without difficulty (especially if I use the magnified view that the EVF offers) and that's with the Yashica lens.
With the OM-2n I can't even see the DVD title and I can barely make out that of the box set that it's next to.
True, the EVF refresh rate drops a bit with the ML f/1.9, but it's still more than just usable. If I replace the Yashinon with the FD 1.4 then that goes away.
Now, the brighter FD lens does also help with the T90, so that obviously plays a significant part in the difficulty with the OM-2 in these conditions. However, the A7 is still usable even when I pop an f/3.5 zoom on it.
I have to confess I am a bit surprised by this. I thought the OM would win hands down regardless.
Hand-held with the Sony at EV 0, FD 50mm f/1.4. Un-magnified EVF resolution of 1024x768.