Canon EOS 90D Advanced User's Manual page 55

Detaching the Lens
Do not look at the sun directly through any lens. Doing so may cause loss of
o
vision.
When attaching or detaching a lens, set the camera's power switch to < 2 >.
o
If the front part (focusing ring) of the lens rotates during autofocusing, do not
o
touch the rotating part.
For instructions on how to use the lens, refer to the Lens Instruction Manual
o
( = 4).
Shooting angle of view
Because the image area
is smaller than 35mm fi lm
format, the eff ective angle
of view corresponds to
approx. 1.6 times the lens's
indicated focal length.
Tips for Avoiding Smudges and Dust
When changing lenses, do it quickly in a place with minimal dust.
o
When storing the camera without a lens attached, be sure to attach the body cap
o
to the camera.
Remove dust on the body cap before attaching it.
o
Attaching and Detaching a Lens
While pressing the lens release
button, turn the lens as shown by
the arrow.
Turn the lens until it stops, then detach

it.
Attach the rear lens cap to the detached

lens.
Image area (approx.)
(22.3×14.8 mm / 0.88 x 0.58 in.)
35mm fi lm format
(36×24 mm / 1.42 x 0.94 in.)
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