deathvalleydave wrote:Regarding looking through the A77's EVF in a high dynamic range situation, am I correct in stating that the dynamic range you see in the EVF is exactly the same as the picture being taken in the A77?
You don't see excactly the same dynamic range in the EVF as the final image. Still I find the EVF really helpful for determining if the exposure is well within the range of "correct" or indicated, or not. With an OVF you don't have a clue, except for looking at symbols that represent the exposure.
Just take an jpg image with the camera, and then display it in the viewfinder. The jpg file will show some more highlight and shadow detail than the live view. Actually I think the limited dynamic range of the viewfinder is to ensure high contrast, so that the display stays "bright and clear".
When learning the EVF to know, I find it really helpful also for judging the exposure. When learned the EVF to know, you soon know how to expose to avoid blown highlight detail, also for jpg files. The shadows are never a problem. They will just follow the exposure as deep as the dynamic range of the sensor can record data.
For most situations you don't have mental capasity to check the tonal range when consentrating on framing and timing, like you can't fine tune autofocus for fast moving subjects. If you could, manual focus wouldn't be any problem. Also, for critical work you have the live histogram and the option of making some brief test exposures to ensure the very best exposure.
Most files are post processed. Even jpg files are often fine tuned. So expecting the viewfinder to show the final result is a bit too optimistic, I think. At best the EVF would show the final result for an unprocessed or in-camera processed image, which is just a starting point for many serious photographers.
Totally, I find the EVF very useful for checking the exposure. Then you have all the other benefits of the EVF, like bright and clear in low light, virtual horizon, live histogram, focus peaking and mignified view on the fly, etc. etc.