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[OM] F280 ModPhoto

Subject: [OM] F280 ModPhoto
From: Winsor Crosby <wincros@xxxxxxxxxxxxx>
Date: Tue, 23 Apr 2002 22:14:18 -0700
Here are some excerpts from the Modern Photography, June 1987, article on the OM4T.

Reference is made to earlier articles on the flash: Aug. 86(SLR Notebook) & Mar. 87(OM77AF), which I don't have copies of.

"...When the flash pulses throughout the entire exposure, it acts more as a continuous light source than as a flash of light. Like available light, it's measured by the camera's normal center weighted OTF metering system, which closes the second shutter curtain the instant the mix of flash and natural light on the scene has produced the proper exposure."

"...In Super FP mode you can use any shutter speed above 1/60 sec. and be assured of full flash coverage. (If you could use Super FP flash at speeds slower than 1/60 sec. it would flash for only part of the time the shutter was open, leading to possible under exposure. The camera does not allow this and signals "under" if you attempt it)..."

"...Only at closer distances and lower shutter speeds, 1/60 to 1/125 sec. do you get enough light to expose a subject by flash alone in Super FP mode.

"...Although illumination provided by the F280 flash is constant in FP mode, the amount of fill can be controlled relative to ambient light by selecting higher or lower shutter speeds. This is accomplished by changing the lens aperture in automatic mode. If you set a lower shutter speed, the amount of fill-in flash will be greater. Moving above 1/250 sec. will darken the shadows(as well as freezing the action and minimizing depth of field). Although background exposure will remain correct, there is no automatic way to determine what would be the proper fill-to-ambient-light ratio for each subject. Often this is a matter of taste or personal preference. Although there are no hard and fast rules for obtaining optimal balance, with a little experimenting you should quickly get a feel for it."
--
Winsor Crosby
Long Beach, California

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