Canon EF 400mm f/4 DO IS USM Instructions Manual - Page 4
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Usage Precautions
O O
When using this lens, please check the Canon website
for the latest camera firmware. If the camera's firmware
is not the latest version, be sure to update to the latest
firmware.
O O
For details on updating firmware, please check the
Canon website.
Shooting Precautions
As a characteristic of the diffractive optics with this lens,
colored flare may occasionally appear around the light
source depending on shooting conditions.
O O
For scenes where a light source is inside the screen,
colored flare may occasionally appear as a halo of light
around the light source or appear fanning out from the
light source.
O O
For scenes where a light source is outside the screen,
colored flare may occasionally appear partially inside
the screen. You can reduce or prevent these issues
with the following steps according to the scene you are
shooting.
• Attach a lens hood.
• Use your hand or paneling, an umbrella, etc. to block
the light source and placed so that they do not appear
in the screen.
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