Terms Explanation F Stop Opening in a camera that controls the amount of light passing into the lens. Pixel The element in a photograph. View finder The screen that shows the framing of an image Control group The one that an experiment is not done. Explanation- Series 13 Keywords– F Stop, Pixel, View finder, Control Group Asked in Paper II June 2011-Mass Communication F- Stop F-stop affects the depth of field in clicked pictures.The F-number of a lens is the ratio of its focal length divided by the diameter of the aperture.A Small F-stop number means the opening is a larger F-stop number means the opening is larger, lighter entering the camera. Similarly a larger F-stop number (remember smaller opening), requires a slower shutter speed. Pixel Resolution refers to the number of pixels in an image.A pixel is the smallest unit of a digital image or graphic that can be displayed and represented on a digital display device.Pixels are combined to form a complete image, video, text or any visible thing on a computer display. View Finder In photography, a viewfinder is what the photographer looks through to compose, and, in many cases, to focus the picture1.Viewfinders can be glass, as found in rangefinder and DSLR type cameras, or an LCD screen as found in mirrorless cameras2. Reference wikipediashuttermuse