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In the last movie, you saw how when I half-pressed the shutter button, the camera autofocuses on my scene, but it does another critical step, which is it meters the scene. That is, it measures the light in the scene, and calculates a shutter speed, and an aperture that will render the scene with a nice level of overall illumination. After it's done that metering, it shows me the shutter speed and aperture that it came up with, and it shows it in a couple of different places. First, I've got here in my status display on the top of the camera. Shutter speed is one 1/100th a second at f/4, but it also shows it in the viewfinder down below the image, along with a lot of other status information.
It is critical that you pay attention to that shutter speed number. We're here in Intelligent Auto mode, where I don't have a lot of control, but I do want to know if shutter speed at the moment is going to be too slow for handheld shooting. If it's much less than a 60th of a second, there's a good chance I'm going to be facing a handheld shake issue. Now, this gets minimized, thanks to my image stabilized lens, and you can actually calculate a minimum shutter speed based on your focal length, and a lot of other things. It's a complex topic, and you can learn more about it in Foundations of Photography: Exposure.
But for working in Auto mode right now, at the very least, what you need to know is, every time you half-press that shutter button, in addition to looking at all the autofocus concerns we looked at in the last movie, you need to pay attention to that shutter speed number, the one on the left, which tells you the shutter speed the camera has chosen. It's the denominator of a fraction, so just think of this as 1 over 100, or 1/100 of a second. If it's much below one 1/60 of a second, you are going to need to take action to really try to stabilize the camera.
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