Do you ever clean the front element of your lens by fogging it up with your breath and then wiping it off with a cloth? If so, you might want to stop — Nikon says the practice could be damaging to your glass. Apparently human breath contains stuff that isn’t too friendly toward camera lenses.
Chemistry and physics teacher MattAttackPro shot the above photo showing what happens when a roll of unused 35mm camera film is dropped into a beaker of hydrochloric acid. What you’re seeing is the emulsion (light sensitive chemicals suspended in gelatin) separating from the clear plastic backing.
(via Boing Boing)
Image credits: Photograph by MattAttackPro