On Jul 11, 2005, at 10:03 AM, P. J. Alling wrote:
Manual Flash is also very posible with the *ist-D. I don't know about the Ds.
What I meant was I wish there was a control on the body to allow one to select "Manual", "TTL flash" or "P-TTL flash". Does the D allow this?
On the DS, the built-in flash (RTF?) only supports P-TTL or full power manual operation. There is no directly accessible switch to choose between them, but you can control which you want after a fashion. When any lens is fitted that either does not have or is not set to the A position on the aperture ring, the flash fires at full power and you have to adjust the lens' aperture ring to achieve proper exposure. In all other cases, the built-in flash operates with P-TTL flash metering. (You will *only* get P-TTL flash metering for lenses that lack an aperture ring, for the obvious reason.)
If you fit an external flash unit, depending upon its features you can operate flash exposure manually, through the flash unit's built in auto-flash sensor, or using the DS body's TTL or P-TTL flash metering capabilities if it is a Pentax-dedicated flash unit. It's only the built-in flash that cannot do TTL flash metering.
Godfrey
