When I set the camera in AV mode the camera never takes an exposure longer than 8 seconds, even when it is completly dark. Also if I choose exposure bracketing and set it to -1 and +1, the camera always uses the 8sec exposure as maximum, even if the picture is underexposed in the end. Does anyone know how to fix this problem? With all DSLR's I used before the maximum exposure time in AV mode was always 30 seconds.