BHP-Brook

Today the sun was out, so I took advantage of the ephemeral occasion just to see what I could find to photography with my pinhole camera.
As I was setting up a drake and duck came close and were feeding at the top edge of this brook, you might be able to vaguely make out the figures.
Camera set at 75mm thus, f/216
I metred with my L-608 = 30 seconds @ f/128 - ISO 100 (Acros, one of my all time favourite Black & White large format films).
Extrapolation: 60 seconds - which appears okay, but darker than the first exposure of 90 seconds, which is the one I prefer and the one you see here.