Much like an incident recommendation, the sunny f/16 rule is based on the quantity of light falling on the scene and or subject, negating background tonal...See more »
Much like an incident recommendation, the sunny f/16 rule is based on the quantity of light falling on the scene and or subject, negating background tonal influence, and subject size relative to the image frame. It is because on a clear cloudless day the sunlight will peek consistently in intensity depending on latitude from mid morning to mid afternoon that we are able to use this rule consistently and accurately to set the midtone. The formula is an easy one 1/ISO @ f/16 and it was included with every box of film sold. Most never paid attention to it, choosing instead to discard it, going with their expensive in-camera meter.See less »