Читать книгу Canon EOS 90D For Dummies - King Julie Adair, Robert Correll - Страница 36

If you bought a zoom lens, it has a movable zoom ring. The location of the zoom ring on the 18–135mm kit lens is shown in Figure 1-25. To zoom in or out, rotate the ring.

Zooming changes the lens focal length. (If you’re new to that term, the sidebar “Focal length and the crop factor” explains the subject.) On the kit lenses, you can determine the focal length of the lens by looking at the number aligned with the bar labeled focal length indicator in Figure 1-25.