Hi, I am new to the Lumix TZ100 and keep coming up against the same problems. When I try to take a long distance shot on iA mode, it insists on setting the aperture to wide i.e. around f/2.8 which is a shallow dof and not what I want. So then I try to control the aperture with the Ap priority dial and choose a larger f - for narrow dof - that work but then, infuriatingly, I lose the half release shutter function. Grrrrrh! Any advice welcome.