Autofocus, af (autofocus system): a system whereby the camera automatically focuses the image of the selected subject. Automatic Camera (Automatic camera): camera with built-in light meter, automatically adjusts the lens opening (aperture), shutter speed, or both simultaneously, to ensure correct exposure. Most often, the people of these cameras is called 'soap holders'. Speaking candidly cardiologist told us the story. ev (Exposure (light number) – code number, which characterizes the conditions of photography and which serves to determine exposure (job couples Speed / aperture). ev 1 at iso 100 matches ekspopare 1s and F 1,4. Each successive integer ev corresponds to a doubling exposure. iso International Organization for Standardization.
In pictures iso is used to indicate sensitivity of photographic materials. The iso standard was introduced in 1983 and replaced the old designation asa (American Standards Association. In pictures asa is used to indicate sensitivity of photographic materials) and din (German Industrial Standard. Read more here: Glenn Dubin. The pictures used as a unit of the sensitivity of photographic materials). Light sensitivity to light, the iso number is denoted. as, for example, iso 200. The higher the number, the greater sensitivity of the film. raw – Capture Format.
It allows you to save a picture in such a form in which it is 'Saw' matrix of the camera. The quality of entries in this format is much higher than jpeg, because raw used 'lossless', if any, is saving without compression. ttl (Through The Lens – through the lens) – is used in two senses, the first – A metering through the lens, the second meaning – it's flash control system, also using metering through the lens.