My 5.7" field monitor is ostensibly smaller than any existing cine EVF...
Well Ray, for starters the original Zacuto Pro EVF is a 3.2-inch screen, with the base unit not much larger, and takes the excellent Zacuto Z-Finder in several configs. I have the Snap version (smallest) and used it with the original Pocket and Micro Cameras, this EVF is still smaller than the Micro camera. Downside, it only go s up to 1080p30, no 60fps Support.
Next the new Zacuto Kameleon EVF, 1080p, Micro-OLED EVF for All Your SDI and HDMI Cameras is only 4.9”(long)x2.75x2.83” and is even smaller than the original EVF and much smaller than you 5.X monitor!
It has both SDI and HDMI, and is an investment, like a good lens, that can be used on several cameras, and not limited in its application.
Kim is correct, in that users today (perhaps not you and me) want more features, like scaling, frame guides for every situation, peaking (a feature I do want), and exposure tools. Zacuto tried to market a scaled down version of its Gratical EVF, removing all the extra features, and allowed the buyer to add the features as needed/wanted. It was not a market success, even at the reduced price.
Pull the BMD EVF off it’s oversize mounting brackets, add a mini HDMI and Mini SDI input, small power plug and mounting module on one side, and you have a very small, compact package, similar to what the Wooden Camera mod was, but with the addition of HDMI inputs, and I think you have a winner. Good optics on a EVF with good eye relief, kind of drive how small a good useable EVF can be, and is going to be the largest part of a EVF, as it is on the new Kameleon, which half of its 4.9-inch length is the optics.
Cheers