I have just recently purchased a used GA 645zi and am happy with the results so far. However, after awhile, I have noticed some things happening that aren't covered in their most pathetic manual. I was wondering if anyone had any input on these; First off when in manual mode shouldn't you be able to use the 1/700th shutter speed in any aperature or chosen focal length? I am finding at 90mm I can only use 700th at f/22 or smaller??????? HUH????? At 55mm I can only get 1/700th at f/11 or smaller. Is this correct or is the camera malfunctioning? I am finding this irritating as I thought with the leaf shutter I could sync at any speed as I want to use my sunpack for a fill with different situations outdoors. Thanks for any input in advance!