Brightness of the monitor screen changes when a picture is taken, the final picture looks blurr. Is there any solution?
you pressing the shutter button half-way and giving the camera time to
lock in the focus before pressing the rest of the way? If not, the good
pictures were just luck.
The overall image is out of focus
If Pan focus is being used, the image may be out of focus; use Auto Focus Mode.
Pan focus uses a focus range of several feet, so the image might be blurry but will be captured faster. This could occur in the EX-Z30, EX-Z40, EX-Z50, EX-Z55 and EX-Z57.
If digital zoom was chosen and the image becomes unclear, only use optical zoom, and move closer.
Check the owners manual; hope this helps.