The amount of light that exposes a frame is determined by the aperture and shutter speed. The size of the aperture controls the amount of light allowed to reach the film, while the shutter speed controls how long the light strikes the film. For the same exposure, a change in shutter speed requires an equal and opposite change in aperture, and vice versa. There are usually several combinations of shutter speed and aperture which will give the same exposure. If. for example, the meter indicates that exposure will be correct at f/4 and 1/60 sec., you usually have other combinations to choose from. Some of the combinations in this example include f/5.6 at 1/30 sec. and f/2.8 at 1/125 sec. The two main considerations involved in selecting one particular combination over the others are the subject's motion and depth of field; each of these affects the way a picture will look. You can control the effect of a picture simply by choosing a certain shutter speed and aperture combination. The next three sections provide information which you may find useful whether you are using the camera manually or automatically with an AE accessory.


The New Canon F- 1 's hybrid shutter is electronically as well as mechanically controlled. Shutter speeds from 1/2000 to 1/125 sec., " f " {1/90 sec.) and "B" (bulb) are mechanically governed, while 1/60 to 8 sees. are electronically controlled. With the AE Finder FN attached and the shutter dial on "A," shutter speeds from 1/1000 to 8 sees. are electronically controlled.

The shutter dial of the camera has settings from 2000 to 8, "A," " f ," and "B." The slow shutter speeds from 2 to 8 seconds are in yellow, while shutter speeds from 1 to 1/2000 sec. are in white. The white numbers are reciprocals of the true shutter speeds; "125," for example, indicates a speed of 1/125 sec. Intermediate settings on the dial cannot be used, and the dial cannot be turned between "B" and "A."

The red "A" is for shooting in the aperture priority and stopped-down AE modes with the Canon AE Finder FN attached. For this setting, pull up the outer ring and turn the dial until "A" is aligned with the index on the finder. A scale with shutter speeds from 8 to 1/1000 sec. will now be displayed below the field of view as long as the AE Finder FN is attached.

The " t " setting is for synchronized flash photography at an X sync. speed of 1/90 sec. It is not necessary to set the shutter dial to " t " when using a dedicated Canon Speedlite; once the Speedlite's pilot lamp glows, the camera automatically switches to 1/90 sec. provided the shutter dial is not on "B."

When the shutter dial is set to "B," the shutter will remain open as long as you press the shutter button. The camera's meter will not give a reading on "B," thus AE photography and match-needle metering are impossible. You will have to experiment or use a separate exposure meter to find the best exposure. It is advisable to use a tripod and locking cable release for long exposures.

Since "B" is mechanically controlled, the battery will not be drained on this setting regardless of the exposure duration.

To cancel shutter operation during a long exposure, press the battery check button.

Mechanical Operation

There are several shutter speeds available with the New Canon F-1 even if the battery fails. In this case, remove the battery from the battery chamber. Shutter speeds from 1/2000 to 1/125 sec., "~" (1/90 sec.) and "B," which are all mechanically controlled, can be used. If the shutter dial is set to any speed between 1/60 and 8 secs.,~the camera switches automatically to 1/90 sec. when you press the shutter button.

The camera will not operate if you leave the exhausted baterry in the battery chamber.

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