the evidence of its use since the ancient times. lead was used for standard weights and coins, as writing tablets, and in paints. the greeks mined lead in laurion in bc and the romans made extensive use of it in kitchen utensils and water pipes, which led to saturnism, or lead poisoning. it has been...
let's keep it clean lens cleaner: the absolute best way to keep your lenses crystal clear is to use lens cleaner. a few pumps directly to the lenses does the trick. we prefer to hold the bottle a couple of inches away from the lens to get good coverage with our spray. that allows you to use less cleaning...