In other words, why is ambient exposure metering independent from TTL metering? Let's say Im taking a picture in a room that has a window and some daylight is getting in,and Im shutting in P (program mode)If the camera exposes for the available ambient light when I press the shutter release button half way, then any flash light will be an excess of light, because the camera has already calculated the shutter speed or aperture needed for a proper exposure
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Why is the front element of a telephoto lens larger than a wide angle lens?
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So I'm looking at the wikipedia article on Aperture, and I'm a bit confused. I understand aperture to be the diameter of the hole th...
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