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Of course, with the flash still on Auto you can set the aperture manually should you wish to use an FL lens. Even then, however, the camera will automatically switch to 1/60 sec. as soon as the Speedlite is ready for firing.
These Speedlites employ a unique light sensing system, separate in the case of the 577G and 533G, which reduces excessive reflection from the central area to give better overall exposure.
With the Speedlites 577G, 533G and 199A, shutter speeds slower than 1/60 sec. can be selected resulting in a lighter background. To control depth of field, you can choose among three working aperture that are automatically preset by the camera. The 577G, 533G and 199A also allow bounce flash. With their corresponding wide angle adapter, flash coverage of a 24mm lens field with the 199A and of a 20mm lens field with the 577G and 533G is possible. A thyristor circuit assures continuous flash shooting at close distances.
General Flash Photography
When you use the
either through the hot shoe or via the PC socket on the front of the camera body. These allow two separate flash units to be fired simultaneously.
Aperture should be manually set on the aperture ring to the working apertures specified for an automatic electronic flash or be determined through a guide number calculation using the following formula.
Guide Number
Aperture =
Shooting Distance
When doing the math, make sure that the guide number and shooting distance are both in the same unit, whether meters or feet.
The fastest shutter speed for use with electronic flash is 1/60 sec., for use with M or FP bulbs, 1/30 sec.
It is recommended to use a Canon flash unit on this camera. Using a flash or flash accessory of another make may cause the camera