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Explaination of EF-S lenses.
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To accommodate the sensor size of APS-C DSLR cameras, the image circle (the circular area in the image plane formed by the cone of light transmitted through the lens) has been made smaller. To accommodate the smaller quick-return lens of the cameras, the back focus (the distance from the rear element of the lens and the sensor) is shortened further (short back focus) than that of the regular EF lenses. Reference:
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Information on Canon EF and EF-S lenses.
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Information on Canon EF and EF- S lenses.
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Characteristics and usage notes for STM Lenses (EF-S Lenses)
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Characteristics and usage notes for STM Lenses (EF- S Lenses)
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How to replace the backup battery.
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The date/time (back-up) battery maintains the camera' s date and time. The battery' s service life is about 5 years. If the date/time is reset when the main battery is replaced, replace the back-up battery with a new CR2016 lithium battery as described below.
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What lenses are compatible with my EOS Digital SLR?
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The following camera bodies are compatible with all EF and EF- S mount lenses: EOS 7D EOS 7D Mark II
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How to change the dioptric adjustment on an EOS Digital SLR.
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By adjusting the diopter to suit your eyesight (with or without eyeglasses), the viewfinder image will look clearer. The camera s adjustable dioptric range is -3 to +1 dpt.
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How to attach the strap on a EOS 40D.
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Attaching the Strap Pass the end of the strap through the camera s strap mount from the bottom. Then pass it through the strap s buckle as shown in the illustration. Pull the strap to make sure it does not slip out of the buckle.
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When Attempting to Open Digital Photo Professional, an Error Message Appears (Screen Resolution and Enlargement Scale)
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NOTE The screens displayed may differ depending on your computerâ s operating system. In case of Windows 7
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The specifications of the EOS 40D.
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Type Type Digital, single-lens reflex, AF/AE camera with built-in flash Recording media Type I or II CF card * Compatible with Microdrive and 2GB or larger CF cards Image sensor size 22.2 x 14.8mm Compatible lenses Canon EF lenses (including EF- S lenses)
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The EOS 40D accepts Ef series focusing screens.
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Ef-A, Standard Precision Matte Ef-D, Precision Matte with Grid Ef- S , Super Precision Matte
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