Tiffen, maker of photographic equipment and filters, has introduced its new Steadicam Smoothee for the iPhone 3GS. Based on the same technology found in professional Steadicam products, the Smoothee is a handheld iPhone mount with a patented design that stabilizes the iPhone when in users’ hands, enabling them to take more steady, professional-looking video. Features of the Smoothee include a fold-up hand grip, quick-release iPhone mount that…