... Still no match for a half-way decent OVF or else so many of the RED owners wouldn't have demanded an OVF (http://www.reduser.net/forum/showthread.php?34814-More-news&p=474710&viewfull=1#post474710), which as far as I know, they still have yet to deliver.
Traditionally through the lens viewing, for motion picture cameras
, has benn provided by a spinning mirror, it's what many motion picture camera operators
are used to and like. The spinning mirroe is both the shutter, and also uses the mirror to reflect light to the ground glass
of the optical view finder. Sorta like the flaping mirror of a DSLR. Because of operator preference the Arri D20 and D21 used this style of view finder. The present Arri Alexa range is made-up of 5 models, four with EVFs and the Alexa Studio with an optical view finder.
Operators with a broadcast
back ground seem to have no problem with EVFs.