The TTL flash sensor measures basically like a centerweighted or averaging meter, just measuring the reflection off the film itself, correct? Assuming an exposure in daylight where you let the camera meter handle the ambient light, let's say you dial in -1 stop TTL flash compensation, or -1.3, or -1.5, etc. How does the TTL sensor differentiate between the light reflecting off the film from the daylight-lit exposure and the flash burst? How can it "see" the flash exposure separately from the daylight exposure well enough to distinguish, especially in dialing down the flash output, a third of a stop difference in the flash part of the picture?
I can understand that P-TTL would have better abilities in this area, and I can imagine that dialing in _more_ flash exposure would be easier to measure. But it seems to work just fine on the PZ-1p with basic TTL flash metering. So how does it work?
Joe
> -----Original Message-----From: Frank Wajer [mailto:[EMAIL PROTECTED]
Hi all,
I've been reading about flash compensation on this list but it's not clear to me what it means.
Flash compensation could be called flash adjustment. It's just setting the power at a level other than the automatically selected one.
If you're using TTL flash, and you're taking a picture of something that's black, the TTL flash meter will get fooled just like an ambient meter would, and will over expose (it thinks the black thing is 18% gray, and throws out more light than needed.)
I also cannot find anything in the manual of my MZ-5n. Is it the same as fill-flash with the flash at lower output so it won't completely fill in the shadows?
Fill flash is a sub-category of flash compensation.
Say you're outside at noon, sun is directly overhead. There's plenty of light, no pressing need for flash, but having the sun overhead will cause a person's eye sockets to darken with shadows. You can use some flash to fill in those shadows.
Fill flash is generally used at less than full power, since there's enough ambient light to make a correct exposure.
The explanation (trick) about using manual mode and the exposure compensation dial for flash compensation, for what flash/body combinations is that.
Works for any TTL flash and camera combo with an exposure comp dial and a manual mode.
I just bought a AF360FGZ from ADORAMA (great shop BTW) and it has flash comp. on the flash so I guess I don't need to use the trick?
I don't think the comp on this flash will work with the 5n.
tv
