With this adapter, you can use Canon EOS lens with Sony NEX NEX-3 NEX-5 Camera * It allows foucs to infinity. * Precise design. Made of Brass And Aluminum, allow install, remove and operate lens smoothly! * With lock pin and lens release pin. * To use Sony NEX camera with Rollei QBM lens, please set "Shooting without lens" in camera menu, * Set camera shooting mode to A or M, use manual focus and shoot