Thanks Monza76 and all others.
I will try the DOF button with exposure compensation instead. Even slower going but hopefully with better results.
Nonetheless the difficulty of using the M lens is obvious.
I wonder how many of the 24 gazillion lenses out there are M :-)
It itches me for a FA 35mm F2.0 but there is a coming DA 18-50 F2.8, Tokina 17-135mm all-around and so on. I will need to sell my car and use that bike more often :-) Wait, the winter is coming in Minnesota: not sure how rugged K100D is but I guess I will find out.