1) Photography equipment
Found on
https://www.crosswordclues.com/clue/lens-board
A Lens board (commonly spelled as lensboard) is a photographic part used for securing a lens to the front standard of a large format view camera. The lens board itself is usually flat, square, and made of metal (most commonly Aluminum) or wood and sometimes plastic. The lens board will have a hole of various diameters drilled dead center on the bo...
Found on
http://en.wikipedia.org/wiki/Lens_board
No exact match found.
