Flash Characteristics in Each Exposure Mode. Pentax K20D, 1938507
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Flash Characteristics in Each
Exposure Mode
Using the Flash in b (Shutter Priority) Mode
• When taking a moving subject, you can use the flash to change the blur effect.
• Any desired shutter speed 1/180 sec. or slower can be set for taking a flash photograph.
• The aperture value automatically changes according to the ambient brightness.
• The shutter speed is locked at 1/180 sec. when lens other than DA, D
FA, FA J, FA, F or A is used.
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Using the Flash in c (Aperture Priority) Mode
• You can set the desired aperture to take a flash photograph when you want to change the depth of field or shoot a subject farther away.
• The shutter speed automatically changes with the ambient brightness.
• The shutter speed shifts automatically anywhere from 1/180 sec. to a
slow shutter speed (p.54) that reduces camera shake. The slowest
shutter speed depends on the focal length of the lens in use.
• The shutter speed is locked at 1/180 sec. when lens other than DA, D
FA, FA J, FA or F is used.
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Using the Slow-Speed Sync
You can use slow-speed sync when shooting portraits with the sunset in the background. Both the portrait and the background are captured beautifully.
• Slow-speed sync slows the shutter speed. Use the Shake Reduction function or turn off the Shake Reduction function and use a tripod to avoid camera shake. The picture will also blur if the subject moves.
• Slow-speed sync shooting can also be performed with an external flash.
Using e/K/c mode
1 Set the mode dial to e, K or c.
2 Press the K button.
3 Press the { button and press the four-way controller (3).
4 Select G or H and press the 4 button.
The shutter speed is set slower to give the appropriate exposure for the background.
5 Take the picture.
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Using b/L/a mode
1 Set the mode dial to b, L or a.
2 Press the { button and press the four-way controller (3).
3 Select E or F and press the 4 button.
4 Set the shutter speed (b) or shutter speed and aperture (L/a).
Set so that proper exposure is obtained in 1/180 sec. or slower.
5 Press the K button.
6 Take the picture.
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Using Trailing Curtain Sync
Trailing curtain sync discharges the flash immediately before the shutter curtain closes. When shooting moving objects with a slow shutter speed,
Trailing curtain sync and Slow-speed sync produce different effects depending on when the flash is discharged.
For example, when shooting a moving car with Trailing curtain sync, trailing light is captured while the shutter is open and the flash captures the car immediately before the shutter is closed. Therefore, the picture will include a sharp, well-lit car with trailing lights behind it.
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Slow-speed sync Trailing curtain sync
1 Set the mode dial to any mode other than B or M.
2 Press the { button and press the four-way controller (3).
3 Select I or k and press the 4 button.
4 Press the K button.
5 Take the picture.
Trailing curtain sync slows the shutter speed. Turn off the Shake Reduction function and use a tripod to avoid camera shake.
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