Thanks Bill, I'm finding the same thing. Seems to be ok most of the time at 400 and 1/90th but every so often it misses by a mile on the under side. The two series where it got steadily more underexposed seems to only happen at ISO 200. Haven't tried with A lenses and the 360FGZ, hope that works a LOT better than this. I've actually not had too much trouble in the past with Pentax TTL flash, this was a bit of a shock.
Don > -----Original Message----- > From: William Robb [mailto:[EMAIL PROTECTED] > Sent: Saturday, October 16, 2004 10:23 AM > To: [EMAIL PROTECTED] > Subject: Re: *ist-D TTL Flash with M Lenses? > > > > ----- Original Message ----- > From: "Don Sanderson" > Subject: *ist-D TTL Flash with M Lenses? > > > > Has anyone played with this enough to figure it out? > > Yes. > I set the camera at 400 and pray. > TTL flash control has never been one of Pentax's strong points, and > the TTL on the istD is one of the worst implementations of technology > that I have ever had the displeasure of having to tolerate. > In a nutshell, it doesn't work. > Period. > > I have posted a series of shots at: > > http://users.accesscomm.ca/wrobb/PDMLtemp/ > > All 4 shots were done within a minute of each other on programTTL > mode with the 31mm lens, using a Metz 60 series flash. > The range was around 10-15 feet. > > This is typical performance for this camera's TTL flash non control. > > William Robb > >

