Regardless of the different flavors of sensors, and their varying sizes, they are close enough to the original APS-C image size, and maintain the classic image proportions that these sensors are generally known as an "APS-C" sized sensor. For an x : y aspect ratio, no matter how big or small the image is, if the width is divided into x units of equal length and the height is measured using this same length unit, the height will be measured to be y units. In , Fujifilm added the Instax Square format to their lineup of instant film cameras. For analog projection of photographic slides, projector and screen use a aspect ratio, supporting horizontal and vertical orientation equally well. In digital images , there is a distinction with the storage aspect ratio SAR , which is the ratio of pixel dimensions. American Cinematographer Manual 9th ed. Often, screen specifications are given by their diagonal length. Anamorphic format is the cinematography technique of shooting a widescreen picture on standard 35 mm film or other visual recording media with a non-widescreen native aspect ratio.