Nomenclature
EF Lenses
●① Focus mode switch ●② Focusing ring
③● Lens mount index ●④ Contacts
EF40mm f/2.8 STM
Instructions
Thank you for purchasing a Canon product.
EF40mm f/2.8 STM is a compact, lightweight,
●“STM” stands for Stepping Motor.
Safety 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.
Cautions during shooting
●This lens uses a stepping motor to drive the focusing lens (the lens that has the job of focusing the shot).
1.Cautions when the power is off
Since the motor does not operate when the camera is off or has been turned by the auto
•The focus cannot be adjusted in manual focus mode.
2.Cautions when the lens is in sleep mode
This lens has a sleep mode separate from the camera auto
Since the motor does not operate when the lens is in sleep mode, even if the camera is turned on, take note of the following points.
•The focus cannot be adjusted in manual focus mode.
•To recover the lens from sleep mode, press the shutter button halfway.
●To shoot with this lens attached on an
●When using an EOS film camera, the action of the focus may slow down if the battery is low on power or when the ambient temperature is low.
●About the AF frame selection
High accuracy cross (+) detection can be used in the center AF frame and horizontal line detection can be used in the frames other than the center AF frame for the following cameras.
Conventions used in this instruction
Warning to prevent lens or camera malfunction or damage.
Supplementary notes on using the lens and taking pictures.
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 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 ○ index of the dust cap, and turn clockwise ❶● . To remove it, reverse the order.
2.Setting the Focus Mode
To shoot in autofocus (AF) mode, set the focus mode switch to AF ❷ .
To shoot in manual focus (MF) mode, set the focus mode switch to MF, and turn the focusing ring to set the focus ❸ .
When the camera AF mode is ONE SHOT AF, focus manually by pressing the shutter button halfway and turning the focusing ring.
●When turning the focusing ring suddenly, the focus adjustment may be delayed.
●The focus cannot be adjusted in MF mode while the camera is off.
●Do not touch the front rotating parts of the lens while autofocus is active.
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