Mini External Camera Auxiliary Body Camera Lens for LBTech EH17 Body Camera

these television lenses start with a very precise design a diamond blade slices up a block of specially selected optical glass while coolant prevents the blade from burning it the slices then go under a diamond drill which cuts several puck sized discs from one glass slice the operator is careful to keep waste to a minimum optical glass costs up to $1,000 per kilogram during the drilling the optical glass sits on a thinner piece of glass covered with wax as the wax is melted the discs are easily pulled away next a device spins one of the discs while a wheel overhead sculpts it into a lens the operator checks each lens for chips and this one looks smooth this tar-like substance is called pitch the edges of the lenses have been built up with tape to contain the pitch they completely coat the underside of the lens with it several pitch covered lenses are now in a metal shell a worker picks