Recently my Leica IIIf was successfully CLA'ed and am feeling I would like to use it more for my traveling and holidays. I have a 35mm Summaron LTM which I like but I have to use an external viewfinder to frame properly. Doing so I have to surrender the cold shoe normally reserved for Voitglander VC meter. I guess I can carry an external light meter while traveling but also want to find out if there others are using a different technique such as using the Barnack cameras with wider focal length than 50mm. Suggestions?