The idea of using my M lenses on a mirror-less camera (particularly a Nex 7 when it becomes available) sounds appealing to me. However, all of the reviews and discussions that I have found so far do not specifically explain the necessary steps to a decent exposure. For anyone who has actually used an M lens on a mirror-less camera - exactly what do you do?
For example, do you focus stopped down to your taking aperture or do you focus wide open then stop down after focus is achieved? Do you set the camera on aperture priority or is the exposure a completely manual process? Is one adapter superior to another when using M lenses?
Just like an old fashioned pre auto camera in many respects, focus at full aperture of course, then stop down for exposure, which you can measure before or after focussing, either setting shutter speed manually or (in the case of my Pana G1 at least) you can use aperture priority when it works the same as 'stop down metering' did on older auto cameras. This is better than such cameras as the cheaper Nikon digital bodies (anything less than a D300) where for some reason they don't allow 'stop down metering' thus disabling the metering with non AF lenses, an incredible (to me) piece of blatant pressure to spend more money!
From Gerry, who grew up with preset lenses and separate meters, and spent many years using a Sinar, experiences all young photographers should have to 'get back to basics' (IMHO of course!)