My Super Tak 50/1.4 has a lever towards the base that allows you to switch between Manual and Auto.
Is this irrelevant when using an m4/3 adapter? Or will one of the settings affect the lens and metering somehow?
Actually, this is not what the switch is for and the compatible Pentax cameras had no ability to set the aperture. The "Auto" refers to auto diaphram stopdown and not to any auto exposure function....
Auto allows the Pentax camera to adjust the aperture according to the light which is of no use on a m43 camera.