Almost nobody but me and the keepers on a cool morning at the zoo.
I used the Pentax Spotmatic with my Auto Yashinon Zoom1:4.5 f-75mm~230mm. It is a lens well suited to the venue in many respects, but also one that requires an intense level of concentration, and reflexes quicker than what I may be able to manage these days. I haven't used the lens much, and don't even remember how I acquired it. Perhaps I'll feel more comfortable with it with more practice.