Stamper, the EM-1 goes up to 60" in A,S or M mode; longer than that and you have to use Bulb or what they call Live Time mode. Live Time mode was new to me, but it's pretty cool. With strong ND filters the image on the screen starts off essentially black, but as the exposure progresses it updates at (settable) intervals so that you see the image gradually forming; and more importantly, you see the histogram progressing to the right, too. So you can end the exposure either by evaluating the histogram, the image, or when you reach the time you want (a timer is also displayed). And like you, I also found that in bright light this camera auto focuses through very strong combinations of ND filters.