Is anyone else having trouble getting sharp images with exposures longer than 2-3 seconds. I think I am ticking all the boxes I use a very stable Manfrotto tripod with a locked down head, A nice tight manfrotto L-bracket tripod mount. IS is turned off and I am using a timer or the app for actuation. it seems if a seagull walks past the shot develops movement. I Really want to use longer exposure times 30 sec to several minutes but I cant get them sharp they are unusable. I dont particularly want to take a time exposure and then try to get a faster shutter speed to add the sharpness back onto the landscape or urban landscape. All ideas are welcomed. thanks