560mm f/6.8 Telyt-R lens and 400mm f/6.8 Telyt-R lens; lens caps for both lenses included. Tripod socket is on the rear attachment tube (which fits both lenses and has rotation capability of camera body). Sliding lens hoods built in. Sold as a pair.
Optically, both lenses have superb resolution. I’ve included two photos here (the grizzly bear shot with the 560mm and the elephants with the 400mm), both photos have been published many times as posters, book illustrations (including covers), in numerous magazines and the grizzly bear was even featured on a large billboard for a bank advertisement. Many other photos made with these lenses have also been published widely in publications around the world.
I used these lenses for several years and they’ve traveled with me to numerous places around the world. So cosmetically they do have some nicks and scratches on the mounts (but NOT on the glass). Both lenses utilize push-pull rapid focusing.

Both lenses can be adapted to digital SLR camera bodies of Nikon, Canon, and a number of other digital cameras. (Adapters not included) Some of these available adapters include a focus confirmation chip that functions with the camera viewfinder to give precise focusing. Here's one on B&H Photo: FotodioX Pro Lens Mount Adapter for Leica R Lens to Canon EF-Mount Camera with Dandelion Focus Confirmation Chip
These are outstanding lenses, as you would expect from Leica.