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The power ratio and the manual flash indicator is
displayed on the monitors when the flash is raised.
Power ratio
8 / 26 11 / 36 16 / 52 22 / 72
The chart lists approximate guide numbers for manual flash calculations. The following
equations are useful in determining the guide number (GN), aperture (ƒn), or flash-to-
subject distance required for exposures.
Guide no. (for distance in meters / feet)
Manual
flash
1/1 (Full)
1/4
1/8
100 200 400 800
Camera sensitivity (ISO)
4 / 13
2.8 / 9.2
5.6 / 18 8 / 26
8 / 265.6 / 18
11 / 36
GN = ƒn. X dist.
GN
ƒn.
= dist.
GN
dist.
= ƒn.
4 / 13
Maxxum/Program Flash 2500(D), 3600HS(D), 5600HS(D), Macro Ring Flash 1200, and Macro
Twin Flash 2400 are compatible with this camera. When using the Maxxum/Program flash units,
if the flash illumination is uneven at the camera’s wide-angle lens position, attach the wide-angle
adapter to the flash units. When the auto-zoom function is used with the Maxxum/Program
3600HS(D) and 5600HS(D) flash units, the flash’s zoom setting will be wider than the lens setting.
When using the Macro Ring Flash 1200 or Macro Twin Flash 2400 in macro mode (p. 49), light
fall off toward the edges of the frame may be noticeable at the wide-angle macro lens position.
Flash Notes
1/2 5.6 / 18 8 / 26 11 / 36 16 / 52
1/16 2 / 6.6 5.6 / 184 / 132.8 / 9.2
5.5 / 18
50
2.8 / 9
2 / 6.5
4 / 13
1.4 / 4.6