on 27.01.03 15:12, Bruce Rubenstein at [EMAIL PROTECTED] wrote: > The 3D primarily has to do with the distance from the camera to the > subject for flash metering. While distance information has been > available from Pentax lenses, it wasn't used for exposure calculation > until some of the newer cameras came out. I don't think that there is > any difference in the percentage of properly exposed, ambient light > shots of either system, but the Nikon flash is better. (Based on years > with a ZX-5 and F100) > Flash 3D matrix control in Nikon is indeed very good, especially compared to "plain" TTL system as it is in ZX-5. It is different than Canon's E-TTL or Pentax P-TTL (they meter flash before mirror is up), because it meters pre-flash after rising mirror - light is reflected from gray-painted curtain and reaches 5-segment flash TTL sensor. That's why it is impossible to distinguish metering- and main flash in this system (something that is clearly seen in Pentax and Canon case). It would be interesting to compare Nikon's flash accuracy to Pentax new P-TTL system with 6-segment metering though...
-- Best Regards Sylwek
