> David Oswald [mailto:[EMAIL PROTECTED] > Subject: *istDS built-in flash overexposure problem > > Let's take, for example, the case of the SMC-Pentax FA 50mm > f/1.4. Shooting at a distance of five feet, at ISO equivilancy of > 200, in fully automatic (smart picture) mode, the frame will come > out completely burned out.
Not on my camera it doesn't. Pentax *istDS + FA50/1.7, AutoPicture mode, built-in flash, ISO 200... I get a normally exposed picture at all distances in the range from 24" to 10' distance. > Now here's the crazy part. When I attach my trusty, tried and > proven AF330-FTZ flash instead of using Pentax's built-in flash, > the shots come out wonderfully exposed. Sounds like the built-in flash metering in your DS body has some kind of flaw. Jens: > I believe it was mentioned previously that on the -Ds it does not > do TTL if you don'thave an AF lens. This is a limitation induced > with extortion in mind, and they may have introduced a bug as a > result. Anyone with a -Ds and FA50/1.4 to verify David's > findings? Not exactly. If you have a pre-A series lens on the camera (or lens with an aperture ring which is not set to A), the camera does not know what aperture setting or lens is in use. The flash reverts to full power manual operation, set exposure by guide number and aperture mode. With an external, dedicated flash, the camera will operate with TTL metering, not P-TTL, so even M series lenses will get TTL flash metering. The DS internal flash unit ONLY does P-TTL flash metering, to the best of my knowledge, or fully manual flash output in the above circumstances. Godfrey __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
