Here's an interesting observation. Using the Pentax live view wears out your camera twice as fast (at least if it's shutter actuations that matter).
With live view, using remote control activation, the sequence is:
- (mirror stays permanently out the way) - IR signal -> shutter closes for shot -> shutter opens and takes shot -> shutter closes having taken shot -> shutter opens for live view
Without live view, the sequence costs half as many shutter actuations. It is:
- IR signal -> mirror goes up -> shutter opens and takes shot -> shutter closes having taken shot -> mirror goes back down
So my preferred option would have to be without live view, but on 3s delay (Pentax default), which makes:
- IR signal -> mirror goes up -> 3s later shutter opens, and takes shot -> shutter closes having taken shot -> mirror goes back down
3s delay is enough to damp mirror vibration but half as many shutter actuations as using live view.
From what I gather other brands don't have such an expensive liveview. For example Canon doesn't do the double shutter thing. Meh, poor Pentax design.