Pentax-K 400mm-600mm f8-f12 Reflex Zoom

A really unique lens, ultra compact for its focal length, is a mirror lens with a zoom focal length. This design is unique as far as I know.

The Neighbor Calf
One of at least three new calves in the pasture a little way up the road. Pentax K-1 mII, K400-600 Reflex Zoom @600mm, handheld

Donuts!
Dogwood tree, only a micro-twist out of focus, taken with my newest lens. Pentax K-1 mII, K400-600 Reflex Zoom @500mm

shot thru a dirty window