Canon EOS 70D Instruction Manual page 38

Attaching and Detaching a Lens
Image Conversion Factor
Since the image sensor size is
smaller than the 35mm film
format, it will look like the lens
focal length is increased by
approx. 1.6x.
Attaching a Lens Hood
A lens hood can block unwanted light and diminish rain, snow, dust etc.
adhering to the front of the lens. Before storing the lens in a bag, etc.,
you can attach the hood in reverse.
If the Lens and the Lens Hood Have a Mount Index
If you do not attach the hood properly, it may obstruct the image's
periphery, making it look dark.
When attaching or detaching the hood, grasp the base of the hood when
turning it. Grasping the hood's edges when turning it may deform the
hood, resulting in failure to turn.
38
1
Align the red dots on the hood
and lens edges, then turn the
hood as shown by the arrow.
2
Turn the hood as shown in the
illustration.
Turn the hood clockwise until it
attaches securely.
Image sensor size (Approx.)
(22.5 x 15.0 mm / 0.88 x 0.59 in.)
35mm image size
(36 x 24 mm / 1.42 x 0.94 in.)