| Aperture-priority AE This mode is ideal for controlling the depth-of-field when capturing a subject. The shutter speed is set automatically for optimum exposure. The input pitch can be selected in 1/3-, 1/2- or whole stop increments (from C. Fn 6-0 to C. Fn 6-2), making it easier to deal with differing film latitudes. Like the Tv mode, the safety shift function (C. Fn 16-1) can be used in conjunction with the Av mode. The group of professional sports photographers in the photo (below, left) was shot at 1/250 sec at f/2.8 on ISO 100 film. The rain started falling and stopped just like that, leaving the conditions to be barely enough for wide aperture shooting with an f/2.8 lens with higher shutter speed. The Chuppa Chup lollipop promoters and the Telefonica MoviStar Suzuki girls were photographed at f/4 with the EF 70-200mm f/2.8L USM zoom lens.
Available light photography can also be used with the Av mode. With this mode, you can set the maximum aperture of the lens right away and allow the camera to set the shutter speed. If you have an f/2.8 lens, you will know immediately whether the camera will allow you a handhold-able shutter speed, as can be seen from the photo of the shopping mall below. The vertical photo of the Light Rail Transport (LRT) was shot with the EF 80-200mm f/2.8L AFD zoom lens set at f/5.6. It was shot through a gap of a fence.
The horizontal photo of the LRT that was photographed outside the Amcorp Mall located in the Petaling Jaya suburb, southwest of Kuala Lumpur, with the same zoom lens set at f/8 and 200mm. The mannequins were shot at f/3.5, also with the same zoom lens set ay 200mm. Depth-of-field AE This advanced aperture-priority AE type of exposure mode is an original EOS innovation. With this mode, the user can manually select two focusing points for calculating the aperture value. This value is used for setting the depth-of-field at a level that ensures sharp focusing between the two points. To set a narrow depth-of-field, the user can select the same spot on a subject for both focusing points. This freedom of choice is particularly useful for portraits shot with a telephoto lens. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 . |
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