Canon EF 100mm f/2.8 Macro USM SpecificationAdd to my manuals
EF100mm f/2.8 MACRO USM
Thank you for purchasing a Canon product.
The Canon EF100mm f/2.8 MACRO USM is a macro lens that can be used for normal
1. The three-group floating system results in excellent delineation at all focusing distances photography as well as macro photography up to 1x magnification. It is dedicated to
Canon EOS cameras.
• "USM" stands for Ultrasonic Motor.
from life-size to infinity.
2. Ultrasonic motor (USM) for quick and quiet autofocusing.
Y focusing mechanism enables AF photography while the macro flash is attached.
Conventions used in this instruction
Warning to prevent lens or camera malfunction or damage.
Supplementary notes on using the lens and taking pictures.
a Safety Precautions a Safety Precautions
• Do not look at the sun or a bright light source
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 through the lens or camera.
Doing so could result undesired operation.
in loss of vision. Looking at the sun directly through
Do not make any changes or modifications to the equipment unless otherwise specified in the instructions. If such changes or the lens is especially hazardous.
• Whether it is attached to the camera or not, do modifications should be made, you could be required to stop not leave the lens under the sun without the operation of the equipment.
lens cap attached.
This is to prevent the lens from
This equipment has been tested and found to comply with the concentrating the sun’s rays, which could cause a fire.
limits for a class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
Y equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
• If the lens is taken from a cold environment into lens surface and internal parts.
COP condensation in this case, first put the lens into an airtight plastic bag before taking it from a cold to 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 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.
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.
Hood and Macro Ring Lite mount (
5, 11) Focus mode switch (
Distance scale ( → 8)
Tripod mounting location ( → 8)
Filter mounting thread
Lens mount index ( → 4)
Focusing ring ( → 4) Tripod mount adapter groove ( → 8)
Focusing distance range selection switch ( → 5)
For detailed information, reference page numbers are provided in parentheses ( → **).
1. Mounting and
Detaching the Lens
See your camera’s instructions for details on mounting and detaching the lens.
2. Setting the Focus
fingerprints on them, corrosion or faulty mode switch to AF.
• After detaching the lens, place the lens with the rear end up to prevent the lens surface and electrical contacts from getting scratched.
• If the contacts get soiled, scratched, or have connections can result. The camera and lens
To use only manual focusing (MF), set the focus COP regardless of the focus mode.
may not operate properly.
After autofocusing in ONE SHOT AF mode, focus
• If the contacts get soiled or have fingerprints on manually by pressing the shutter button halfway them, clean them with a soft cloth.
and turning the focusing ring. (Full-time manual focus) • If you remove the lens, cover it with the dust cap. To attach it properly, align the lens mount index and the K index of the dust cap as shown in the diagram, and turn clockwise. To remove it, reverse the order.
3. Switching the Focusing
You can set the focusing distance range to
0.31 m/1.0 ft. to infinity or 0.48 m/1.6 ft. to infinity.
the lens, and also protects the front of the lens
By setting the suitable focusing distance range, the actual autofocusing time can be shorter.
If you autofocus outside the set focusing distance range, the lens may stop focusing at the start of from rain, snow, and dust.
Attach and align the hood to the hood mount on the front of the lens, and turn the hood as shown by the arrow to secure it.
The hood can be reverse-mounted on the lens the focusing range; however, this is not a
Y for storage.
malfunction. Press the shutter release button halfway again.
• Part of the picture may be blocked if the hood is not attached properly.
• When attaching or detaching the hood, grasp the base of the hood to turn it. To prevent deformation, do not grasp the rim of the hood to turn it.
• Remove the hood when using the macro flash.
5. Picture Taking
The lens can be used as a medium-telephoto lens for normal photography such as portraits.
Close-up photos up to 1x (life-size) magnification are possible. The minimum focusing distance of
31 cm is the distance from the subject to the focal plane. The working distance from the front of the lens to the subject is about 15 cm.
When focusing, you can give priority to framing or to magnification.
the subject, focus with the AF or MF mode.
1. Set the lens' focus mode switch to MF.
2. Set the magnification.
While referring to the magnification scale on the lens, turn the focusing ring to the desired magnification.
3. Focus the subject.
While looking through the viewfinder, move the camera forward or back to find the point of focus.
4. Touch up the focus.
Turn the focusing ring for fine focusing.
Since macro shots have a very shallow depth of field, focus carefully to obtain proper sharpness.
Y subject’s size and the corresponding image size on the focal plane. On the distance index, it is indicated as 1:x.
• To prevent camera shake, using a Remote
Switch (both sold separately) and tripod is recommended.
• To check the depth of field, press the camera's depth-of-field preview button.
6. About Exposure
Setting the Exposure
When taking photographs using TTL metering, no exposure compensation is necessary to meter
When you use a handheld exposure meter to set the exposure, you must take into account the exposure factor shown in the following table.
the light coming through the lens.
Magnification 1 : 5 1 : 3 1 : 2 1 : 1.5 1 : 1
With TTL metering, AE (autoexposure) is
possible at all focusing distances. Just set the
Exposure Factor +
3 desired picture-taking mode, then check the shutter speed and aperture before taking the picture.
Magnification and Effective f-
* Upper values: 1/3 stops. Lower values: 1/2 stops.
• The correct exposure for a close-up shot largely
The aperture displayed by the camera assumes that the focus is set to infinity. The actual aperture (effective f-number) becomes darker
(effective f-number increases) at closer focusing depends on the subject. Therefore, try to bracket the exposure for the same subject.
• Using aperture-priority AE ( Av ) or Manual ( M ) picture-taking modes are recommended for macro photography as it is easy to adjust depth of field and exposure in these modes.
distances (magnification increases). This does
not cause exposure problems for normal picturetaking. However, for closeup photography, you cannot ignore the change in the effective fnumber.
If your eye will not be covering the eyepiece when the picture is taken (with remote control operation, etc.), use the eyepiece shutter or eyepiece cover.
This prevents stray light from entering the eyepiece and throwing off the proper exposure.
7. Infinity Compensation
Infinity compensation mark
8. Using the Tripod
To mount the lens on a tripod, Tripod mount ring B
(B) and the tripod mount adapter (sold separately) for the EF100mm f/2.8 Macro USM will be necessary.
Tripod mount adapter Tripod mount ring B (B)
To compensate for shifting of the infinity focus point that results from changes in temperature.
Tripod mount attachment lugs Locking
Attachment index aligned with the distance indicator on the distance scale.
Y tab Tripod mount base
The infinity position at normal temperature is the point at which the vertical line of the L mark is
Mounting lugs COP
• When switching to vertical shooting, rotate the camera so that the grip is at the top. Rotating the camera in the opposite direction will have the grip bump into the tripod mount.
For accurate manual focusing on subjects at • Before attaching or detaching the lens, set the tripod mount back to its normal position infinity distance, look through the viewfinder while rotating the focusing ring.
(horizontal shooting position). Otherwise, the tripod mount may bump into the camera grip or pentaprism and prevent the lens from being attached to or detached from the camera.
• If the EOS camera has a built-in flash, the pentaprism may prevent the tripod mount from being rotated to the top of the lens.
Using the Tripod Mount (Sold separately)
Attaching and Detaching the Tripod Mount
To attach the tripod mount, follow the illustrated procedure below. To remove the tripod mount, follow the procedure in reverse.
Loosen the tripod mount’s COP mount’s index, and slip on the tripod mount.
Align the tripod mount adapter's index with the lens mount index. Push in the adapter onto the back of the lens.
• The tripod mount adapter's inner lugs should slide into the grooves on the lens barrel.
The adapter should not be able to rotate around the lens barrel.
Rotate the tripod mount to the desired position and tighten the lock knob.
• You can loosen the orientation lock-knob on the tripod mount to allow it to rotate as needed to fit a particular camera model for switching between vertical and horizontal positions.
Depending on the EOS camera model, if a battery pack or vertical grip is attached, the tripod mount may bump into it. If that is the case, remove the battery pack/vertical grip or the tripod mount.
10. Extension Tubes
You can attach filters to the filter mounting thread on the front of the lens.
You can attach Extension Tube EF12 II or EF25
II for magnified shots. The shooting distance and magnification are shown below.
• Filters and the macro flash cannot be used on this lens at the same time.
• If you need a polarizing filter, use the Canon
Circular Polarizing Filter (58mm).
• To adjust the polarizing filter, first remove the lens hood.
Near Far Near
EF12 II 314 1002 1.19
× EF25 II Y 319
Manual focusing is recommended for accurate focusing.
11. Close-up Lenses
12. Macro Flash
Attaching a 250D or 500D (58mm) Close-up
Lens enables close-up photography.
The magnification will be as follows.
• Close-up Lens 250D: 1.44x - 0.40x
The Canon Macro Ring Lite MR-14EX or the
Macro Twin Lite MT-24EX enables fully automatic macro flash photography up to 1x magnification in E-TTL autoflash mode.
• Close-up Lens 500D: 1.28x - 0.20x
Manual focusing is recommended for accurate focusing.
• For information on operating the Canon Macro
Ring Lite MR-14EX or the Macro Twin Lite MT-
24EX, refer to the individual instruction booklets.
• Using aperture-priority AE ( Av ) or Manual ( M ) picture-taking modes are recommended for
Y of field and exposure in these modes.
Angle of View
Min. Focusing Distance
Field of View
Max. Diameter and Length
Hood (Sold Separately)
Case (Sold Separately)
Tripod Collar (Sold separately)
100 mm f/2.8
8 groups, 12 elements f/32
Diagonal: 24° Vertical: 14° Horizontal: 20°
0.31 m/1.0 ft.
24 × 36 mm/0.9 × 1.4 in. (at 0.31 m)
78.6 × 118.6 mm/3.1 ×
580 g/20.5 oz
Ring-type tripod mounting socket B (B)
(comes with the EF100mm f/2.8 MACRO USM adapter)
• The lens length is measured from the mount surface to the front end of the lens. Add 21.5 mm to include the
E-58U lens cap and dust cap, and 24.2 mm for the E-58 II.
• The size and weight listed are for the lens only, except as indicated.
• The EF1.4X II/EF2X II extenders cannot be used with this lens.
• Aperture settings are specified on the camera.
• All data listed is measured according to Canon standards.
• Product specifications and appearance are subject to change without notice.
CT1-8508-004 0812Ni © CANON INC. 2002
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- Component for: SLR Macro lens Black
- Lens structure (elements/groups): 12/8
- Maximum aperture number: 32
- Closest focusing distance: 0.31 m