[Dennis]

Here is a comparison showing the non-use and the use of Mirror Lock Up (MLU). The photos aren’t pretty, but I was just playing around in the lounge room, trying hard not to disturb my wife and guests!

Canon 40D with 400mm F5.6 lens on a tripod, using remote shutter release.
Photos taken under a 40W table lamp showing various shells in an acrylic moulding some 4 metres away from camera.
Raw captures at ISO800 1/60 sec at F5.6 with no processing or sharpening.
Cropped from full frame.

Top photo – without MLU.
Bottom photo – using LiveView hence MLU active.

I have highlighted the grey ellipse area on each photo to show the additional detail recorded in the shell when using MLU.

Cheers

Dennis

EDIT
Full frame photo added, resampled down to 1024x683, to show where the crop came from.