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Lens Controls

Lens controls diﬀ er according to the lens that

you're using. One aspect that all Canon

lenses have in common is full-time manual

focusing. You can switch to manual focusing

by setting the switch on the side of the lens

to MF, or Manual Focusing. Manual focusing

includes focus assist. As you adjust the focus-

ing ring on the lens, the focus conﬁ rmation

Filter mounting thread

1.8

Lens controls, as shown on an EF 70-200mm f/2.8L IS USM lens

Chapter 1

Focusing distance range selection switch

Focusing ring

Distance scale

Focus mode switch

Image stabilizer switch

Roadmap to the EOS 50D

light in the lower right side of the viewﬁ nder

lights steadily and the camera sounds a focus

conﬁ rmation beep when sharp focus is

achieved.

While lenses are covered fully in Chapter 8,

navigating the camera includes the lens, so I

include lens controls here. Additional lens

controls may include the following depend-

ing on the lens.

Zoom ring

Tripod

mount

Image stabilizer mode switch

Lens mounting index

Orientation locking

knob