In the case of the £198 Optio S5z, the main feature distinguishing it
from the virtually identical S5n is its big 2.5in monitor. To accommodate
such a big screen on such a small camera the case has been partially
redesigned and is 3mm taller and 1mm thicker than its predecessor, but
the size and position of the lens, flash, AF illuminator and self-timer
indicator are unchanged. The extra height comes from the curvature of the
previously flat top panel, but the positions of the on/off button and
shutter release are identical to the previous model.