This is not the same as the Electronic First Curtain shutter found on the A7, A99, A77, A6000 and so on but conspicuously absent on the A7R. Nor is it the same as the near-silent leaf shutter terminated exposure mode of the RX100 models, RX10, or RX1 models. It’s completely free of all mechanical action and totally silent.
Sony Adds Silent Mode Upgrade On The New Sony A7S —Photoclub Alpha
Shared on Jun 02, 2014 · Via