No ULs have been set for potassium from dietary sources. For infants 0-12 months, the source of intake should be breast milk, formula and food only. For children, adolescents and adults, including pregnant and lactating women, supplements should be taken only under medical supervision.
Autofocus is a mechanism in an optical system which automatic ally changes the optics to focus an image. In a camera, this is used to focus the subject image, through the lens, onto the focal plane-the film or digital sensor. Autofocus MethodsEdit ... Autofocus Evolution.
Selecting and Shooting with an Autofocus Mode. 1  Press the AF button on the top of the camera (A). 2  Use your index finger to rotate the Main dial until the desired AF mode is selected. 3  Locate your subject in the viewfinder, then press the shutter button halfway (hold this position if using the AI Focus or AI Servo modes).