Another type of opto-mechanical lens is the design of Joshua Silver, and uses liquid pressure against a diaphragm to control focus of a lens.
silver | Silver Star | Joshua Reynolds | Joshua Bell | Horace Silver | Silver Spring, Maryland | Joshua | Silver Lake | Silver | Silver Spring | The Silver Chair | Silver Jews | Sheldon Silver | Silver Lake Partners | Silver Jubilee | Pokémon Gold and Silver | Silver City | Joshua Nkomo | Joshua James | The Joshua Tree | Silver City, New Mexico | Joshua Bates | Abraham Joshua Heschel | Silver Surfer | Silver Linings Playbook | Joshua Tree National Park | Rolls-Royce Silver Ghost | Queen Elizabeth II Silver Jubilee Medal | ''Pokémon Gold'' and ''Silver'' | Joshua the High Priest |