Brochure

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usa.canon.com/eos
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EF LENSES
Full-Time Manual Focusing
Canon EOS cameras with EF lenses deliver
impeccable AF precision. Manual focusing
capability, nevertheless, can enhance
flexibility. Canon
EF lenses with
full-time manual
focusing enable the
photographer to
manually tweak
focus without
switching out of
AF mode. Since AF
action does not cause the focusing ring to
turn, it can be made wider for improved
grip and comfort.
15mm Fisheye
FOCAL LENGTH COMPARISON
Specialty Lenses
Fisheye — With its unique focal length range,
the EF 8–15mm f/4L Fisheye USM offers an
interesting and exciting perspective. It delivers
180° diagonal angle of view images for all EOS
SLR cameras with imaging formats ranging from
full-frame to APS-C, and provides 180° circular
fisheye images for full-frame EOS models. This
Canon lens has a wide zoom range feature
that provides a truly elevated level of creativity
and performance for users shooting artistic
compositions or panoramic landscapes, as
well as astronomy and sports.
EF-S lenses — Designed for the Canon
EOS 7D Mark II, EOS 70D and all EOS Rebel
models with APS-C sized sensors with a
1.6x crop factor, Canon’s EF-S lenses take
advantage of the camera sensor’s smaller
size to help deliver optimized performance in
compact, lightweight designs.
TS-E — TS-E lenses are capable of tilt and shift
movements, which bring many of the advantages
of technical view cameras to the EOS System.
Tilt movements alter the angle of the plane of
focus between the lens and film plane, making
broad depth-of-field possible even at larger
apertures; shift movements slide the lens’
optical axis along the film/sensor plane, enabling
photographers to correct or alter perspective at
almost any angle.
Macro — Canon’s EF lens lineup has a number
of options for true close-up and macro
photography. With six macro lenses for
precision, and three screw-on close-up lenses
for convenience – in addition to the Life-Size
Converter EF and two Extension Tubes –
Canon’s macro lenses and close-up accessories
can uncover detail that is nearly impossible for
the unaided human eye to detect.
EF Mount
The Canon EF mount is much more than
simply a way to attach a lens to a camera
body. As the communication conduit between
camera and lens, this fully electronic mount
enables high-speed autofocus, precise
aperture control and preview, makes automatic
compensation with lens extenders possible
and can communicate data such as focal
length, lens model, even serial number for
Reverse tilt and shift greatly reduces the range on which
focusing is possible.
With a normal lens With a TS-E lens
Astigmatism
Floating Effect
(TS-E 24mm f/3.5L)
Closest
shooting
distance
TS-E 24mm f/3.5L Floating System
Floating
Focal plane
The lens’ tilt mechanism is used to achieve a pan focus effect
that allows focusing all the way back.
Shift was used to adjust the image to keep the building
perpendicular all the way to the top.
Without shift, the image of the building leans in at the top.
Tilt Movements – Using a normal lens, shallow or deep focus is
controlled by the size of the aperture used to adjust depth-of-field.
Canon TS-E lenses can help achieve this by the tilting of the
lens barrel in relationship to the focal and subject planes. This
allows for the appearance of extremely deep focus even at wide
open apertures, and shallow focus at smaller apertures.
Shift Movements – By keeping the camera level, and
using the shift function to raise the lens instead, this
perspective effect can be corrected. With the camera’s
focal plane set parallel to the building, shifting the lens
upward will obtain a more rectangular-looking building.
About Macro Magnification
A life-size macro lens – that
is, a 1x magnification –
records an image on film at
its actual size. If you’re
photographing fruits, for
example, and it has a
diameter of 1 in., it will
occupy 1 in. of your actual
slide or negative. With a
digital SLR camera, at 1.0x
magnification, the image
projected onto your camera’s
sensor will likewise be the
same size at the sensor
plane as the actual subject
itself. Other macro lenses
have lower or higher
magnifications. A lens with
0.5x magnification will
produce an image on film
that is half the size of the
actual subject. Your 1 in.
fruit then would only
occupy 0.5 in. on film.
In the other direction, a
5x magnification lens will
convert the 1-in. fruit to
a 5-in. diameter image.
Since the entire image
won’t fit in the frame of
your film, you will have an
enlarged image of a detail
of the fruit.
Magnification is not the
same as focal length. A
50mm lens and a 180mm
might both be macro
lenses with, for example,
1.0x magnification. The
advantage of the longer
lens is that it allows greater
distance from a subject,
while allowing the same
magnification in the final image. The 180mm lens is ideal for
shooting tiny subjects without disturbing them; the 50mm is
better choice for copying flat documents.
0.5x
1.0x
0.25x
5.0x
3.0x
14mm 17mm 20mm 24mm 28mm 35mm 50mm 70mm
85mm 100mm 135mm 200mm 300mm 400mm 500mm 600mm 1200mm
Depth-of-field with tilt movements
Plane of optimum focus
Film plane
Using Tilt Movements to Focus an Oblique Subject Plane
Using Shift Movements to Focus a Tall Building
TS-E Movements
Tilt Movements alter the angle of the plane of focus between the lens and focal plane, and Shift Movements move the lens’
optical axis in parallel.
180°
114°
104° 94° 84°
75° 63° 46° 34°
28° 30' 24° 18° 12° 8° 15' 6° 10' 5° 4° 10' 2° 5'
EF 8–15mm f/4L Fisheye USM
•
f/5.6
•
1/200 sec.
Focal Length: 8mm Approx. 10mm
Approx. 12mm Approx. 15mm
Full size
Circular fisheye
APS-C
Full-frame fisheye
APS-H
Full-frame fisheye
Full size
Full-frame fisheye
The diagram below shows the relationship between each
image size and a 180˚ angle of view for each focal length.
* The red circle for each focal length is the size of a 180˚ angle of
view on the image plane.
EF 8–15mm f/4L Fisheye USM
•
f/4
•
1024 sec.
in-camera processing and recording. Ready
for the future, the EF mount offers both
forward and backward compatibility with
lens technologies such as USM and Hybrid IS,
as well as new optical designs, such as EF-S
lenses and Cinema EOS lenses as they are
developed by Canon.
Floating System
Typical lenses correct for optical aberrations
only at commonly used focusing distances.
Not surprisingly, at other focusing distances,
especially close range, aberrations can
compromise image quality. Rather than
using fixed spacings, Canon’s floating system
dynamically varies the gap between key lens
elements based on focusing distance. Most
aberrations can be effectively suppressed
throughout the focusing range, helping to assure
high image quality in all shooting situations.
Circular Aperture
Canon lenses featuring circular aperture
diaphragms employ curved blades to create
a smoothly rounded opening as the lens is
stopped down. As a result, most out-of-focus
background highlights are rendered as
natural-looking rounded shapes rather than
as distracting polygons. These lenses deliver
smooth, consistent stop-down action (even at
14.0 fps), near-silent operation and excellent
optical characteristics.
Inner and Rear Focusing
An inner focusing lens has the focusing lens
group(s) in front of the diaphragm, while a
rear focusing lens has the focusing lens group(s)
behind the diaphragm. Both designs allow for
compact optical systems that produce faster AF.
And because the front of the lens does not rotate
to focus, filter orientation remains constant.
AF Stop Feature
Pressing the AF Stop button (featured on several
EF IS telephoto lenses) momentarily locks the
AF to help prevent the focus from shifting to a
passing obstruction. After the obstruction has
cleared, the focus will still be on the subject, and
you can quickly resume shooting. AF Stop buttons
are positioned at four locations around the lens
grip for easy access.
Dust- and Water-Resistant
Construction
Most L-series EF
telephoto lenses
are dust- and
water-resistant
thanks to rubber seals
at the switch panels,
exterior seams, drop-in
filter compartments
and lens mounts.
Moving parts, such as
the focusing ring and
switches, are also designed to help keep out
environmental contaminants, providing reliable
performance under harsh conditions.