A Few Stupid Questions (forgive me and be gracious) regarding shooting a SF20 Flash United on a Leica M6. 1.) When shooting the flash can one zone focus and/or use hyper-focal distance focusing? I would assume that before shooting the rangefinder with the flash that one needs to focus prior just like one would without the flash. 2.) Would one need to consider the light meter in the Leica M6 when shot manually? I am wondering if this would apply only for the TTL mode when using the SF20 flash on the Leica M6? I have read the manual and searched the rangefinder forums to look for these answers but no luck. Thanks and sorry I may have further questions.