Thanks everyone for the replies ,much appreciated. I have quite a large collection of M42 lenses so they would be usefull but I do tend to end up needing quite wide angle lenses so with the crop factor I would most likley need some dedicated Lenses. I'm not sure exactly what I'm after yet but will most likely be talking second hand so I can afford to destroy it whilst doing various camera unfriendly activities and thought of micro 4/3 as an improvement to my point an press cameras while still keeping a reasonable size and weight. Graham I take it you mean using those lenses that the camera its self will still control the lens aperture but the camera will not recognize your setting if done from the Lens ? I've not really messed with digital other than a couple of point and press cameras.