Here's a portrait of Russian cosmonaut Oleg Kononenko posing with Nikon DSLR gear on the International Space Station on October 6th, 2015. Tens of thousands of dollars in camera equipment is stored on the walls of Zvezda, the Russian service module in the ISS. As you can see, there are lens mounts fixed to the walls of the module for storing the collection of glass.
If you're a photography enthusiast and ever have the good fortune of finding yourself floating around on the International Space Station, here are two words you should know: service module. Formally called the "Zvezda Service Module," it's the component of the ISS that houses all of the station's life support systems, and is where the astronauts gather if there is any kind of emergency. But here's the main reason you'll want to pay the module visit: the fancy camera equipment used by the astronauts is stored on the walls!