The 540EZ provides 8 manual flash settings ranging from full power to 1/128 power, adjustable in 1-stop increments
- When shooting continuous flash exposures in manual flash mode, prevent the flash head from overheating by limiting the number of continuous flashes according to the power settings, as follows:
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1/1, 1/2 power
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not more than 15 continuous flashes
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1/4, 1/8 power
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not more than 20 continuous flashes
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1/16, 1/32 power
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not more than 40 continuous flashes
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1. Set the camera's shooting mode to aperture-priority AE mode (Av) or manual exposure mode (M)
2. Set the flash mode to manual (M)
If a shooting mode other than aperture-priority AE (Av) or manual exposure mode (M) is set, the minimum aperture value of the lens will blink in the camera's LCD panel when the shutter button is pressed halfway
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3. Press the Select/Set button, the flash output level blinks in the flash unit's LCD panel
4. While watching the flash unit's LCD panel display, press the plus button or minus button to set the desired flash output level amount. Each press of the plus button or minus button increases or decreases the output level by 1 stop
5. Press the Select/Set button again so that the output level display stops blinking. The output level will automatically stop blinking if 8 seconds elapse before the Select/set button is pressed
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6. Cover the subject with the viewfinder's AF frame and press the shutter button halfway. When the shutter button is pressed halfway, the camera focuses the subject and the flash coupling distance indicator bar and aperture value are displayed in the flash units LCD panel
7. Check the shooting distance indicated on the lens' distance scale
8. Check the coupling distance indicator bar in the LCD panel. If there is a difference between the shooting distance (indicated on the lens' distance scale) and the LCD panel's coupling distance indicator bar, adjust the aperture until the coupling distance indicator matches the shooting distance.
- The coupling distance indicator bar can be adjusted by changing the flash output power level
- If there is a large difference between the shooting distance and the coupling distance display, change the flash output power level and refocus the subject, then adjust the aperture until the distance indicated on the coupling distance display is the same as the shooting distance.
- For more precise exposure control, use a commercially-available handheld flash meter.
9. Make sure the shutter speed and aperture value displayed in the viewfinder are not blinking and that the flash charge indicator icon is lit, then take the picture
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