I think a loupe on the back of my 5D2 liveview LCD with some ergonomic support makes a decent EVF. What's the most advanced EVF you have used so far (jerry-rigged or otherwise)?
I like the advantages so much that I'm starting to use it more often than the OVF (60% or so). What percent of the time do you use liveview?
I think the advantages of EVF are:
- Zooming to any part of the image for critical focus
- View the actual captured image, including white balance, black and white, etc;
- Movie mode.
- Live zebras, histograms, false color "raw" mode, guide lines, overlays, etc.
- 100% accuracy for framing.
- Accurate DOF (typical viewfinder screens show f/1.2 as if it were f/3.5, making critical manual focus impossible).
- Accurate rendition of the bokeh
- Usable in much darker situations, including effective f/32 for macro, etc.
- Contrast detect autofocus with movable focus points
- Allows the entirety of the primary mirror to be used for phase detect autofocus (instead of a small secondary mirror), so AF sensors can cover the entire frame instead of just the middle third portion.
- The possibility of reducing lag from 40ms to 0ms or even negative lag (this would not apply if a mirror is still used for phase-detect autofocus).
- Battery usage
- Heat generation (in some circumstances can cause thermal noise to rise above the read noise floor).
- Current technology may be relatively expensive, slow frame rate, low resolution, and/or bulky.
- Dynamic range limited by the sensor instead of the eye/brain.
A $50 million feature film was shot with a $3k EVF using manual focus and thin DOF ("Knowing"; it grossed about $93 mil so far). They will only get better, smaller, and cheaper with time. I think its inevitable that they appear in more and more cameras.
How many years will it be before the number of EVIL camera shipments outweigh DSLR?