Photography Calculators Focal Length Calculator A simple calculator to determine the actual field of view of lenses on different cameras. Lens focal lengthEnter the lenses focal length in "mm". Enter "70" for a 70mm lens.Sensor SizeAPS-C (Canon)APS-C (Nikon)APS-HFour Thirds System35mm Full Frame Equivalent Δ Time Lapse Calculator A simple form to calculate time lapse settings. Length of VideoLength you want the final video to be (in seconds)Frame Rate243060Select your desired frame rate.TimeHow long will you capture your images (in minutes)Total amount of pictures to capture.Time between image captures. (seconds) Δ