Sasanko
on 2011-03-11 10:30:00
http://www.google.co.in/url?sa=t&source=web&cd=1&ved=0CB0QFjAA&url=http%3A%2F%2Fcctvcad.com%2FFiles%2Fthe_principles_of_cctv_design_in_videocad_part1.pdf&rct=j&q=principle%20of%20cctv%20camera&ei=W096TaT1E5OEvAONpITUBw&usg=AFQjCNGJEoqrz4ikAYXJIw03u6PWlofR-g&cad=rja