Originally posted by HenrikDK I would STILL like to see results from someone with an unetched screen. Anyone?
Unetched S-type screen on K-5
With the A50/1.2, using spot metering, Av mode, Live View (LV) consistently chooses a shutter speed one increment faster (I have the camera set to 1/3-stop increments) than with LV off. That is, VF metering overexposes 1/3 of a stop compared to LV. Whether or not the VF cap is in place doesn't make much difference (maybe a slight one). With matrix metering, there is no difference between VF and LV metering.
With the A400/5.6, spot metering again gives 1/3-stop overexposure using VF metering (as compared to LV). No difference with or without VF cap. Matrix metering gives a very different result. Without the VF cap, VF metering overexposes by a full stop. With the cap, the overexposure is reduced to 2/3 of a stop.
Addendum:
The above testing was with a uniform gray wall as a subject. Using a high-contrast scene, matrix metering, now the A50/1.2 overexposes by 1/3 stop, but the A400/5.6 exposure is correct. Go figure.