Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: a device for producing or controlling light
Categories: device
Within this category: autofocus, biprism, camera lucida, coelostat, collimator, diffraction grating, diffuser, finder, Kerr cell, laser, lens, Nicol prism, planetarium, polarimeter, prism, projector, Rochon prism, stereoscope, viewer
