According to a friend shooting with th 77, the EVF is a pain with PL filters since it tries to compensate for the brightness change which makes challnging to adjust polarization. Not sure if somebody else experienced that?
Bernard, [Revised after I checked my camera's settings and tested a few things!]
Yes, I have occasionally had that problem with my EM5, caused by EVF auto-level adjustment (called "Live View Boost" on the EM5), along with the related problem that one does not get a preview of how luminosity levels are effected by exposure compensation or a histogram that reflects exposure compensation settings. But
all these problems can be avoided by suppressing that auto-brightness adjustment, giving a more WYSIWYG display of brightness. On the EM5, this "Live View Boost" is on by default, but more experienced users will probably benefit by turning it of most of the time.
On the other hand, I am of the faction that uses the VF primarly for framing, manual focusing, and checking for appropriate exposure level (like avoiding blown highlights), so for me, the eye-level live preview given by an EVF wins over both OVFs and rear-screen live view for:
- the ability to do accurate manual focusing while using an eye-level VF, including the cases of focusing at an off-center point, and hand-held close-ups where focus and re-compose is impractical.
- live histograms and warnings of over-exposed and/or underexposed regions in the VF.
Of course, an SLR with accessory EVF could offer the best of both worlds, and seems appropriate for at least some high-end cameras, especially DSLRs intended for serious video usage. I wonder if and when Canon or Nikon will offer that, given that they seem to be the only two major camera makers still interested in making high-end DSLRs.