More great advice on getting the most out of your digital SLR:
In part one of this series you kicked your digital SLR camera's auto mode to the curb with the help of program mode. In doing so, you learned to control the flash, the ISO value, and the white balance. Now in part two we're going straight to manual mode to learn about aperture sizes and shutter speeds. So let's do this thing. Put your camera in manual mode by turning the mode dial to the "M" setting as pictured above.
Your camera is basically just a box with a hole in it and a light sensor inside. If the right amount of light gets through the hole to strike the sensor, you get a properly exposed picture. If you get too much or too little light, you get garbage. You already know that in program mode you can control the sensitivity of the light sensor itself by changing the ISO value, but in manual mode you can also control the amount of light that gets inside in the first place. You do that with the shutter and the aperture.
Follow the link for detailed explanations of shutter, aperature, and more. As the article says, "photography is all about trade-offs". No wonder this economist loves it!
See my previous post on mastering program mode on your DSLR.
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