Canon 815mm Owners Manual

							EF8-15mm f/4L Fisheye USM
Instruction
ENG 
						

							ENG-1 6. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
7. A truly round aperture hole results in a nicer
background blur.
8. Equipped with a zoom limiter function which
restricts the zoom range.
9. Tight seal structure ensures excellent dust-
proof and drip-proof performance.
• USM stands for Ultrasonic Motor.
Conventions used in this instruction
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.
Thank you for purchasing a Canon product.
The Canon EF8-15mm f/4L Fisheye USM lens is
a high-performance fisheye zoom lens designed
for use with Canon EOS cameras.
Features
1. Designed for use with three different image
sensor sizes.
2. Aspherical and UD lens elements result in
outstanding image delineation.
3. SWC (Subwavelength Structure Coating) is
utilized to significantly reduce occurrences of
flare and ghost created by quite large incident
angles of light.
4. A fluorine coating has been applied to the
lens’s front and rear lens elements which
allows dust to be wiped from the outside of the
lens more easily compared with previous
lenses.
5. Ultrasonic motor (USM) for quick and quiet
autofocusing. 
						

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aSafety Precautions
aSafety Precautions•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 especially hazardous.
•Whether it is attached to the camera or not, do
not leave the lens under the sun without the
lens cap attached.This is to prevent the lens from
concentrating the sun’s rays, which could cause a
fire.
Handling Cautions•If the lens is taken from a cold environment into
a warm one, condensation may develop on the
lens surface and internal parts.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.
•Do not leave the lens in excessive heat such as in
a car in direct sunlight.High temperatures can
cause the lens to malfunction.
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
Do not make any changes or modifications to the equipment
unless otherwise specified in the instructions. If such changes or
modifications should be made, you could be required to stop
operation of the equipment.
This equipment has been tested and found to comply with the
limits for a class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in
a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of
the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Consult the dealer or an experienced radio/TV technician for
help.
This Class B digital apparatus complies with Canadian ICES-003. 
						

							ENG-3
Precautions for Shooting with a Fisheye Lens
•If dirt or dust adheres to the surface of the front lens element, it can easily appear in images due
to the lens’s short focal length. In order to avoid this, please remove dirt or dust from the surface of
the front lens element by using a commercially available air dust blower.
•Since this lens has an extremely wide angle of view, light from bright light sources, such as the
sun, can easily enter the image area. Please do not look at bright light sources using the camera’s
viewfinder.
•Depending on shooting conditions, flare and ghost will occur when bright light sources appear in
the image area. In order to prevent flare and ghost, we suggest shooting places such as shaded
areas so that bright light does not enter the lens.
•Unintentional photographing of the user’s body can easily occur during handheld shooting.
Likewise, the legs of a tripod can be unintentionally photographed when a tripod is used.
In addition, due to the optical characteristics of this lens, unintentional photographing of objects
can easily occur since the angle of view exceeds 180° in the close-up shooting range.
Therefore, please use the camera’s viewfinder or LCD display to carefully check the image area.
•Since this is an interchangeable lens, the center of the image circle of the circular fisheye and the
center of the image sensor are out of alignment. Also, there are times when vignetting, which
occurs in the four corners of an image, is not uniform.
•It is possible to use AE (Auto Exposure) even if vignetting occurs in the four corners of an image
when using a circular fisheye effect, etc. However, since the angle of view is extremely wide and
the luminance range of subjects is broad, we suggest changing the exposure manually when
possible.
Also, it is recommended that users check the image area using the LCD display when shooting
with a digital camera. 
						

							ENG-4
Nomenclature
Distance scale (→ 9)
Focus mode switch (→ 6)
“C” / “H” Indicator (→ 7)Zoom Limiter (→ 7)
Lens mount index (→ 5) Contacts (→ 5) Hood mount (→ 10)Zoom ring (→ 6)
Focusing ring (→ 6)
Gelatin filter holder (→ 12)
For detailed information, reference page numbers are provided in parentheses (→**). 
						

							ENG-5 See your camera’s instructions for instructions on
mounting and detaching the lens.
•After detaching the lens, please attach the lens
hood and lens cap and place the lens with the
rear end up to prevent the electrical contacts
and lens surface from getting scratched.
•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 
Kindex of the dust cap as shown
in the diagram, and turn clockwise. To remove it,
reverse the order.
1. Mounting and Detaching the Lens
The lens mount has a rubber ring for enhanced
water- and dust-resistance. The rubber ring may
cause slight abrasions around the cameras lens
mount, but this will not cause any problems. If the
rubber ring becomes worn, it is replaceable by a
Canon Service Center at cost.
aPlease be careful when laying the lens sideways
while the lens hood and the lens cap are
attached.
The lens may roll and fall, resulting in injury. 
						

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3. Zooming
To zoom, turn the zoom ring.
Be sure to finish zooming before focusing.
Changing the zoom ring after focusing can affect
the focus.
To shoot in autofocus (AF) mode, set the focus
mode switch to AF.
To use only manual focusing (MF), set the focus
mode switch to MF, and focus by turning the
focusing ring. The focusing ring always works,
regardless of the focus mode.
2. Setting the Focus
Mode
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway
and turning the focusing ring. (Full-time manual
focus) 
						

							ENG-7
“C” and “H” Markings
Adjacent to the zoom ring, the “C” and “H”
markings serve as guides to indicate the wide-
angle zoom position where focus is set at infinity
at which photos can be created without
vignetting when using EOS digital cameras
installed with APS-C or APS-H image sensors.
The “C”/”H” indicator on the zoom ring is aligned
with either the “C” or “H” marking.
Zoom Limiter
The zoom limiter function allows for wide-angle
photos to be created when focus is set at infinity
without vignetting when using an EOS digital
camera installed with an APS-C image sensor by
limiting the zoom range.
Activate the zoom limiter by setting the zoom ring
to between 10mm and 15mm, then slide the
switch towards “LIMIT.”
Zooming
When the “C” / ”H” indicator above the focus ring
is aligned with either the “C” or “H” marking, there
are times when vignetting occurs in the corners of
an image since the size of the image circle
becomes smaller when the focus position is set at
close range due to the optical characteristics of
this lens.The zoom limiter cannot be used if the zoom ring
is set between 8mm and about 10mm (when the
“C” / “H” indicators on the zoom ring are set
between the “C” indicator and the wide-angle
direction on the ring next to the zoom ring). 
						

							ENG-8
• Circular FisheyeThe circular fisheye effect refers to the 180 degree circular angle of view which appears within the area of the image sensor. When the
focusing distance of this particular lens is set to infinity, the circular fisheye effect is achieved by setting the focal length (wide end) to
8mm and using a camera equipped with a full frame image sensor.
• Diagonal FisheyeThe diagonal fisheye effect refers to a 180 degree diagonal angle of view which corresponds with the size of the sensor. When the
focusing distance of this particular lens is set to infinity, the diagonal fisheye effect is achieved by setting the focal length (telephoto
end) to 15mm when used with full frame image sensors, approximately 12mm when used with APS-H, and approximately 10mm when
used with APS-C.
Zooming
Description of Fisheye Lens Based PhotographyThe various images below show the different relationships between the fisheye lens’s 180 degree angle of view and the size
of each image sensor related to focal length.
Focal Length: 8mm
* The circle corresponding with each focal length indicates a 180 degree angle of view in the imaging area.
* Vignetting occurs in the area outside of the image circle.
Full Frame 
Circular FisheyeApprox. 10mm
APS-C 
Diagonal Fisheye Approx. 12mm
APS-H 
Diagonal FisheyeFull Frame 
Diagonal FisheyeApprox. 15mm
•Use of the zoom limiter at the lens’s wide end position does not guarantee that a diagonal fisheye effect will be
created when used with APS-C sensors.
•When the focusing distance is set to infinity, the angle of view when using the lens set at the telephoto end together
with full frame format cameras is 175°30’ (diagonal). The 180° diagonal fisheye effect is achieved by slightly turning
the zoom ring toward the wide end when the lens is set at 15 mm (telephoto end).
•Due to the optical characteristics of the lens, the size of the image circle becomes smaller when the focus position
is set at close range. 
						

							ENG-9
4.Infinity Compensation Mark
Infinity compensation mark
Distance index
To compensate for shifting of the infinity focus
point that results from changes in temperature.
The infinity position at normal temperature is the
point at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
For accurate manual focusing on subjects at
infinity distance, turn the focus ring while looking
through the viewfinder or checking the camera’s
LCD display.
The infrared index corrects the focus setting when using
monochrome infrared film. Focus on the subject
manually, 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 800 nm.
•The compensation amount differs depending on
the focal length. Use the indicated focal length
as a guide when setting the compensation
amount.
•Be sure to observe the manufacturer’s
instructions when using infrared film.
•Use a red filter also when you take the picture.
5. Infrared Index
Some EOS cameras cannot use infrared film. See
the instructions for your EOS camera.