Thank you for your comments. This one was taken with the 50mm f/4 Flektogon. Not so obvious at this size, but the bottom corners have a tell-tale out of focus look on all of my pictures with this lens. Not sure if it's just mine, or a problem with all of them!
The other picture I posted today is pretty much the same scene but using the Biometar, and a few steps further along the cliff.