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David Busch’s Canon® EOS 50D Guide to Digital SLR Photography by David D. Busch

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Chapter 7. Working with Lenses

In April 2008, Canon announced that it had produced its 40 millionth EF-series lens, a mere 21 years after the company’s current autofocus mount was introduced (back in the film era). Considering that it took 11 years for Canon to sell its first 10 million copies of its EF lens line, but only two years and three months to peddle its most recent 10 million lenses, it’s easy to see that the digital photography revolution can take credit for the most recent explosion.

With more than five dozen lenses in its current lineup, Canon is catering to the wide-ranging needs of a broad user base, from novice photo enthusiasts to advanced amateur and professional photographers. Thousands of current and older lenses introduced ...

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