Accessory Review: Phottix BG-5D III Battery Grip for Canon 5D Mark III

The Phottix BG-5DIII battery grip is a budget-friendly alternative to Canon's BG-E11 battery grip for the EOS 5D Mark III, allowing you to double the battery life and enhance handling when shooting vertical format images. Can it do the same job for less cash, or should you save up for the Canon-branded accessory? Find out in our review.