Sunny16 is a fun, easy to use exposure calculator that implements the Sunny 16 exposure rule and then some. This app is ideal for anyone with a film or digital camera with an M (manual) mode who wants a quick tool to help set up the perfect exposure or anyone who wants to understand the relationships between the elements that create a properly exposed image. Sunny 16 is a basic photographic exposure rule that works like this: If it’s sunny set your aperture to f/16 and your shutter speed to…