Canon EOS Rebel T7 Mode D'emploi page 20

Handling Precautions
Cards
To protect the card and its recorded data, note the following:
Do not drop, bend, or wet the card. Do not subject it to excessive force,
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physical shock, or vibration.
Do not touch the card's electronic contacts with your fingers or anything
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metallic.
Do not affix any stickers, etc. on the card.
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Do not store or use the card near anything that has a strong magnetic field,
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such as a TV set, speakers, or magnets. Also avoid places prone to having
static electricity.
Do not leave the card in direct sunlight or near a heat source.
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Store the card in a case, etc.
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Do not store the card in hot, dusty, or humid locations.
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Lens
After detaching the lens from the camera, put down the lens
with the rear end up and attach the rear lens cap to avoid
scratching the lens surface and electrical contacts.
Smudges Adhering to the Front of the Sensor
Besides dust entering the camera from outside, in rare
cases lubricant from the camera's internal parts may adhere
to the front of the sensor. If smudges are visible on the
images, having the sensor cleaned by a Canon Service
Center is recommended.
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Contacts