This is because the second image sensor located in the A350's viewfinder housing alleviates the need for the additional mirror flips required by most other phase-detect Live View implementations. The big news is that the A350's shutter lag in Live View mode is just as fast as when using the optical viewfinder. When prefocused, shutter lag dropped to 0.088 second. Continuous autofocus mode lag time was about the same, and manual focus was only slightly faster at about 0.167 second. The A350 required about 0.188 second for full AF. In terms of the A350's ability to determine that it's properly focused when shooting the same target multiple times, its speed is above average for a consumer model. For most cameras, shutter lag is less in manual focus than autofocus, but usually not as fast as when the camera is "prefocused".
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