Hi Rafael
one of the things that I too like about my G1 is that it works so well with older manual focus stuff. I've been using extension tubes (which are cheaper) and getting great results too:
and stuff in the field which I couldn't have done back with 35mm (composition and live view flexability). I could never have chased this bumble bee around ...
and I probably wouldn't have "wasted film" on trying stuff like this either
(of course some may I shouldn't have wasted space on it ;-)
I didn't like what APS did to my lenses (espeically as I had a lovely TS-E 24 which became a useless TS-E 38 on a 20D) but I do like what can be done with the Micro 4/3rds stuff.
Of course metering is just a simple setting of "shoot with lens off" and camera in Av mode.
Great