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to work improperly or even possibly damage the camera itself.

Digital Readout in Flash Photography

When you preview exposure in flash photo- graphy, the digital readout will differ depending on the type of flash photography.

1.AE flash with Canon Speedlite 133A, 155A, 177A, 188A, 199A, 533G or 577G and an FD Lens

The flash is on Auto while the lens is set to the “A” mark. The digital readout will display a shutter speed of 1/60 sec., the flash signal “F” and the auto working aperture set on the flash as follows: 60 F 2.8. The A-1 automatically switches to 1/60 sec. when the flash is charged regardless of the shutter speed set as long as it is not set to “B”. The “F” flash signal appears in the viewfinder only when the flash pilot lamp lights up to

.indicate that the flash is charged. Thus, you will know the flash is ready simply by looking in the viewfinder. The aperture value displayed is the auto working aperture you have set on the flash depending on the ASA film speed. (The aperture displayed in the readout may be 1 /2 f/stop larger or smaller than the auto working aperture set on the flash though the auto working aperture is the effective aperture). The auto working aperture value is automatically set on the camera.

Exposure warnings are very similar to those in shutter priority AE. If you have set an auto working aperture larger than the maximum aperture of the lens, the maximum aperture of the lens will flash on and off to indicate underexposure. If you have set an auto working aperture smaller than f/16, the set auto working aperture will flash on and off. If the minimum aperture of the lens is equal to or smaller than the flashing aperture, exposure will be correct. If larger, the image will be overexposed.

If, with Speedlite 199A, you want to use a shutter speed of 1/30 sec. or slower, set the AE mode selector to TV and the AT dial to the desired shutter speed and set the shutter speed selector switch on the 199A to the MANU position. In this case, the shutter speed on the AT dial will be displayed in the readout.

2.Automatic Shutter Setting Autoflash Control with Canon Speedlite 133A, 155A, 177A, 188A, 199A, 533G or 577G

The flash is on Auto but the aperture is manually set by turning the lens aperture ring. This type of automatic flash control is necessary with an FL lens and other non-FD lenses and possible with an FD lens when it is not set to “A”.

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