Automatic flash systems are generally used for more advanced photography applications. The Canon Speedlite 160E is a fully loaded unit that fits the bill. At 2.32 x 3.26 inches and just 3 oz, this Canon shoe mount flash is compact and lightweight, yet packs a big punch for its size. Specifically made to support TTL flash exposure, the unit was originally designed for the manufacturer�s EOS 850 and 750 camera bodies, but is also compatible with a number of older Canon models, including the EOS 650, 630, and 620. The Canon Speedlite 160E is bundled with an arsenal of features that photographers can use to enhance its flexibility, output quality, and overall performance. Equipped with a guide number of 52, this automatic flash provides 35 mm in lens coverage, in addition to a coupling range of 2.2-18.3 ft. As a dedicated TTL-enabled unit, the Canon shoe mount flash automatically fires away in conditions where light is limited, as well as other environments that demand fill-in flash functionality in photography equipment. Meanwhile, serious photographers will have peace of mind with the promise of up to 4,000 flashes and a speedy recycle time ranging from 0.3-1.7 seconds, the latter of which ensures that little to no time is wasted between shots. As an added bonus, the convenient build makes this particular unit an ideal travel companion, even when connected to older, bulkier cameras. All in all, the Canon Speedlite 160E is a solid option for professional flash photography needs.