Originally posted by Aristophanes You cannot get that with EVF, not on the size of screen for a portable system.
I am sorry to say. But you confuse EVF with rear LCD screen.
EVF stands for electronic viewfinder. Serious implementations would be based on replacing the focus screen by an (almost) equally sized 4MP (**) OLED screen and you would still watch through the ocular. Such EVFs don't exist yet why EVF-based cameras aren't yet considered serious tools by many.
But this has nothing to do with the principle. The principle of EVF is NOT inferior to OVF. Just their current implementations are. Stay tuned.
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(**) Human eye resolving power is about 20 arcsec (at ~5% MTF; more like 60 arcsec at 50%). So, a 35mm focus screen fooling the eye at 100% 1.0x magnification (what Pentax MX was close to provide) requires 4.8µm large RGB pixels (a 7500x5000 RGB screen). The relaxed MTF50 requirement (which would be judged excellent but still inferior to optical) means a 2500x1670 or 4.2MP RGB screen (12.5 million dots). Personally, I'll have a look as soon as they surpass 10 million dots (or 8 million with Samsungs RGB dot array). BTW, this requires a live feed surpassing 3.3MP which is much more than the current and alias-prone 0.9MP 720p or 2.1MP 1080p live feeds.
Addendum:
On the other hand, as soon as this happens, a camera's VF is a great cinema. I'll then expecting binocular attachments to sell like hot cakes and 3D front lens adapters to become a standard
Maybe, EVF's of this quality will become stand-alone gagets to go with your xPhone etc. too, not just your system camera. A standard to attach EVFs may be a desirable thing soon, much like the flash hot shoe "standard".
Last edited by falconeye; 05-20-2010 at 06:40 AM.