OK, so I've compared my K5+EE-S screen with a K7 + stock screen...
With my samyang 85/1.4, exposure is identical wide open. So I guess the screen brightness is identical with f/1.4 lenses.
With the DA18-55, the results are more complex:
- using standard metering, the K7 "sees" a slightly brighter scene at 18/3.5 (it underexposes by 1/3 stop in comparison), but then it "sees" a darker scene at f/5.6, and overexposes by a full stop compared to the K5+EE-S...
- the K7 has some hefty metering discrepancies between liveview and standard metering, too, more pronounced than with the EE-S screen!
From this, I think the stock screen is slightly brighter between f/1.8 and f/3.5, and about the same brightness at f/1.4 and f/4, which is quite consistent with commonly available stop-down results on the K7 screen.
Then, from f/4 on, the EE-S is in fact brighter than the stock screen.
Last edited by dlacouture; 05-04-2011 at 06:18 AM.