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Do not look at the sun or a bright light source through
the lens or camera.
Doing so could result in loss of
vision. Looking at the sun directly through the lens is
Whether it is attached to the camera or not, do not
leave the lens under the sun without the lens cap
This is to prevent the lens from concentrating
the sun’s rays, which could cause a fire.
If the lens is taken from a cold environment into a warm
one, condensation may develop on the lens surface and
To prevent condensation in this case, first
put the lens into an airtight plastic bag before taking it
from a cold to warm environment. Then take out the lens
after it has warmed gradually. Do the same when taking
the lens from a warm environment into a cold one.
Handling the EF50mm f/1.0L USM and EF85mm f/1.2L
The EF50mm f/1.0L USM and EF85mm f/1.2L USM are
ultra-high-precision lenses. Take care not to subject them to
shocks or impacts. Also ensure that the lenses are set to the
” setting before putting them in the case.
1. Mounting and Detaching the Lens
See your camera’s instructions for details on mounting
and detaching the lens.
• After detaching the lens, place the lens with the rear end
up to prevent the lens surface and contacts from getting
• If the contacts get soiled, scratched, or have fingerprints
on them, corrosion or faulty connections can result. The
camera and lens may not operate properly.
• If the contacts get soiled or have fingerprints on them,
clean them with a soft cloth.
• If you remove the lens, cover it with the dust cap. To
attach it properly, align the lens mount index and the
index of the dust cap, and turn clockwise. To remove it,
reverse the order.
2. Setting the Focus Mode
To shoot in autofocus (AF) mode, set the focus mode switch
To shoot in manual focus (MF) mode, set the focus mode
switch to MF, and focus by turning the focusing ring.
Setting the Focusing Range (for EF50mm f/1.0L USM)
Two autofocus ranges are selectable with the lens
: From closest focusing distance to infinity.
: From 1 m to infinity.
3. Depth-of-Field Scale
The depth of field is the distance in front of and behind the
plane of focus on the subject that appears sharp. The depth
of field is indicated by the area between the depth-of-field
scale lines below the distance scale. The numbers on the
scale are F values, and for example, if the shooting distance
is 1.5 m/5 ft. and the aperture is f/11 with the EF35mm
f/2, the sharp area will extend from about 1.2 m/4 ft. to 2.8
• The depth-of-field scale is an approximate indicator.
4. Infrared Index
The infrared index corrects the focus setting when using
monochrome infrared film. Focus on the subject in MF,
then adjust the distance setting by moving the focusing ring
to the corresponding infrared index mark
• The infrared index position is based on a wavelength of
• Be sure to observe the manufacturer’s instructions when
using infrared film.
• Use a red filter also when you take the picture.