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The Complete Idiot's Guide® To Photography Essentials by Mark Jenkinson

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Chapter 4
Formats: Digital Sensors and Traditional Film
For the purposes of this book, I will steer clear of going into the ins and outs of various types of digital sensors (CMOS, CCD, Fovean, and so on). Whatever sensor you already have in your camera is probably fantastic, so don’t worry about changing anything.
However, it is important to look at some of the primary differences in the file size and compression options, as well as the different capture formats, to get a better idea of how to use what you’ve got.

All Megapixels Are Not Created Equal

A pixel is a “picture element.” Each pixel represents one of the mosaic-like tiles that creates a digital photograph.
On the digital chip inside your camera, there are “imaging arrays”—millions ...

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