Hi Bruce, on 05 Jan 04 you wrote in pentax.list:
>Certainly an area that I am most interested in. I am not shooting >with the AF500FTZ. I have the AF360FGZ and 2 AF400T's and 1 AF280T. >Could you be a bit more specific about what your results are like? There's a German thread on incorrect flash exposures at http://www.digitalfotonetz.de/phpBB2/viewtopic.php?t=4997&highlight= A source at Pentax Germany has explained that there exists a problem with the TTL-metering (I only repeat some statements of the mentioned link): The TTL-sensor measures the light that is reflected from the CCD's surface. But it seemes, that the reflection of the CCD differs depending on the chosen ISO setting. The exposure will be correct only at ISO400 as the development and testing of the TTL-measurement was apparently made at ISO400, only. At ISO settings below 400 the camera will under-expose, at setting above 400 it will over-expose. This problem can probably not be solved by a firmware update as there is no upgradeble TTL-software but some kind of hardware solution. The problem does not exist if you use P-TTL. I didn't try that myself (although I have an AF500FTZ I'm not a great flash user), but maybe this informations brings some light into the flash behaviour of the *istD. Cheers, Heiko
