Spot metering and shooting sunsets
Swan Lake near Vernon - it was a perfect evening for shooting a sunset. Whenever I shoot sunsets, I change my camera's metering system to spot. There are three, sometimes four, different ways that your camera has to measure light. The standard one involves the camera reading light from numerous places in the scene and determining an exposure value (EV) based on that information. This is the Matrix, Multipattern, Multisegment, and Evaluative metering systems found in some of the different camera brands. Spot metering is different and records the light coming in from one point in the scene and uses that to determine an EV. OK, what's an EV? An EV (exposure value) is a number, usually expressed as an integer, and may go as low as -6 to +18 and is measured in stops. A stop is a doubling or halving of light and is usually expressed in seconds (1/2 to 1/4 is a change in time by one stop) or aperture (f/5.6 to f/4 is a change in light coming through the lens...