The Pocket Mini 11:1 Director's Viewfinder is one of the lightest and most compact models of the Viewfinders from Alan Gordon Enterprises, Inc. It is an essential tool proven to be a versatile accessory for directors, cinematographers, production designers, set builders and location scouts at a budget price. The Pocket Mini features various aspect ratios. Various lens focal lengths are clearly marked, providing you with rapid selection. The collapsible rubber eye cup prevents the scratching of your glasses. Telescopes from 2 1/2" to 3 1/2"-Aspect Ratio: TV, 35, 16, 1.66, 16:9, 1:85,2.35, & 2.55-1/3” Chip Range: 3.9mm - 44mm-1/2” Chip Range: 5.2mm - 58mm-2/3” Chip Range: 7.2mm - 80mm-S16 Range: 10mm - 114mm-35mm Range: 18mm - 200mm-Anamorphic Range: 35mm - 400mm