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Attaching and Detaching a Lens
Turn the zoom ring on the lens
with your fingers.
If you want to zoom, do it before
focusing. Turning the zoom ring after
achieving focus may throw off the focus.
While pressing the lens release
button, turn the lens as shown by
Turn the lens until it stops, then detach it.
Attach the rear lens cap to the
To owners of the EF-S18-135mm f/3.5-5.6 IS STM lens or
EF-S18-200mm f/3.5-5.6 IS lens:
You can prevent the lens from extending out while you are carrying it
around. Set the zoom ring to the 18mm wide-angle end, then slide the
zoom ring lock lever to <LOCK>. The zoom ring can be locked only at
the wide-angle end.
Detaching the Lens
Do not look at the sun directly through any lens. Doing so may cause
loss of vision.
When attaching or detaching a lens, set the camera’s power switch to <
If the front part (focusing ring) of the lens rotates during autofocusing, do
not touch the rotating part.
If you purchased a lens kit with the EF-S18-135mm f/3.5-5.6 IS STM
lens, EF-S18-55mm f/3.5-5.6 IS STM lens, or EF-S55-250mm f/4-5.6
IS STM lens, see “Handling Precautions” on page 400.
Angle of View
Since the image sensor size is smaller
than the 35mm film format, the angle
of view of an attached lens will be
equivalent to that of a lens with approx.
1.6x of the focal length indicated.
Image sensor size (Approx.)
(22.3 x 14.9 mm /
0.88 x 0.59 in.)
35mm image size
(36 x 24 mm /
1.42 x 0.94 in.)