Canon lens EF 815mm f4L Fisheye USM User Manual

EF8-15mm f/4L Fisheye USM
Instruction
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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
War ning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking...

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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...

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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...

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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)
F or detailed information, reference page numbers are provided in parentheses (→ **).
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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...

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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
f ocusing 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...

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“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...

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• 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
f ocusing 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....

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4.Infinity Compensation Mark
Infinity compensation markDistance 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.
F or 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...