grmedhat1 Offline Image Upload: Off
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The rule of thumb is for indoor shots set the flash to standard TTL (sans BL). This will set the camera to give correct flash exposure. TTL-BL provides a reduced flash output for fill-flash outdoors in bright sunlight. The idea with TTL-BL is the flash will lighten the deep shadows on the subject increasing detail in those areas. You are not trying to eliminate the shadows, just lighten them. TTL-BL is setting the flash so it's not to be the key light source but only a fill - hence the reduced output. TTL-BL is auto negative flash compensation where the camera decides how much reduced flash output is needed.
If you want control of your fill-flash, shoot in standard TTL mode and dial in your own amount of negative flash compensation. (Not exposure compensation.)This is the preferred method by some because you know where the starting point is and know how much reduced flash you are applying to the subject.
Just remember with flash photography you are dealing with two light sources on your subject. One is coming from the flash, the other from other sources. As already mentioned play around with it, take notes, film is cheap. Flash photography isn't the complicated once you know what's going on but getting there is a learning curve.
Have fun with it. Ask questions. You'll get it. The sun is starting to come up. I gotta go take pictures.
Edited on Aug 17, 2005 at 05:10 PM
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