More 100-300 tests - IS & shutter settings

#2 - Is there a noticeable difference between electronic (silent) shutter and EFCS (0s Antishock)?

I shot a series at various focal lengths, all handheld at f5.6 1/30s, varying the shutter type.

The electronic shutter definitely has some advantage over EFCS, though the shot-to-shot variability is high enough that it's hard to see it in any particular subset of shots.

Interestingly, the mechanical shutter does OK at 200 and 300mm but is comparatively bad at 100mm. This is on the low end of the shutter speed range for shutter shock, so it may just be that at 200 and 300 there isn't enough sharpness available to detect the shock effect.

I also shot a sequence at 300mm handheld, varying shutter speed. I couldn't control the lighting, so the results are somewhat confounded by lens performance (a small loss due to aberrations at 1/2000 & f5.6, and a lot due to diffraction at 1/125 and f22).

Eshutter (red) serves as the benchmark. EFCS is almost indistinguishably as good. Mechanical shutter is also OK, until you get into the shutter shock death zone at 1/125. I don't see evidence of a dropoff at 1/400 when EFCS cuts out, switching to mechanical shutter.

The real shocker here is how much worse performance is with my old GH2. I don't think it's sensor performance, because mtf_mapper results seem to be fairly ISO-invariant. It could be shutter shock, or it could be some difference in raw processing.