I'm getting ready to pull the trigger on the purchase of an EM-1 system. I've sold all my manual focus medium format gear, as well as all my Nikon film and digital, and lenses. Going to the mirrorless side. My favorite subject is mountain streams and waterfalls. I spend a number of weeks in the Spring and Fall in the Smokies. My normal practice was all medium format primes, Velvia, f16, and hyperfocal focusing set at f11. Do the Olympus m43 primes have DOF scales? The only Olympus prime I have is a 25mm f2.8 for the older 4/3s system. It does not have any DOF scale. Could be I'll have to adjust my technique and rely on experience and the large DOF of the smaller sensor systems. But I'd like to find out before I make my purchase. I have already decided to get the new 12 - 40 zoom for general purpose. I'm thinking of the Panasonic 7 - 14 for really wide POV, which I tend to like for my water subjects. Any info and opinions are welcome. Thanks.