Not my first choice for a walk-around lens, and the only reason for buying it was the very reasonable price I was offered for this Reflex-Nikkor 500mm f/8 (old version).
It has been lying around for some time, but last October I decided to really test it out. Actually I found it more versatile and useful than expected. It does have (a lot) less contrast than refractive optics, but this was not always very obvious (depending on the scene). Also, the small, fixed aperture could be a bit challenging in low light situations (at least without a tripod, which was the case for several of the pictures). The ISO capabilities of the Nikon Df was handy at times.
1. The very top of the Holmenkollen ski jump hill.
2. A small spillway.
3. A shot through the side window of my car while driving along a forest.
4. Rainbow over Aursunden (lake close to the UNESCO world heritage city of Røros).
5. A piece of road with moisture after light rain.