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Electronic Flash - how to use Canon 540EZ flash

Stephen Matera , Oct 02, 1996; 08:04 p.m.

I recently bought Canon's 540EZ flash, and own an A2. The instruction manual isn't very clear, or informative. I'm looking for a good book on using the flash with my camera, or just some great tips. I want to use if as fill flash for mountain biking shots, or even as the sole source of light in low light situations. I usually set my exposure manually, and like to use the flash on TTL mode while the camera is on Manual. Any ideas or suggestions?


Philip Greenspun , Oct 02, 1996; 08:11 p.m.

The most complicated thing here is that the A2/EOS-5 cameras will automatically reduce the flash output by about 1.3 stops when the ambient light is "bright". You can disable this with a custom function. It is documented in at least the EOS-5 manual.

My main suggestion is to do everything manually unless your subject will be more or less smack in the middle of the frame. The Canon flash metering system sucks. Nikon got it right with their D system.

Anyway, if your subject is front and center then all you really need to do is set the exposure compensation on the back of the flash to -1 or -2 stops or whatever. Then the flash exposure will be calculated automatically.

The Kodak Professional Photo Guide has some useful tips on fill flash.

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