Nope. The camera has no idea how the flash will bounce due to the reflectivity of the surroundings without the preflash. Even with the flash pointing straight ahead, some of the sideways light may bounce off the walls/ceiling.
> -----Original Message----- > From: Lon Williamson [mailto:[EMAIL PROTECTED] > Sent: 11 August 2003 14:37 > To: PDML Pentax Discuss > Subject: p-TTL: works with pre-flash only? > > > I am under the impression that Pentax's snazziest new > flashes work by flashing twice in their "smart" mode: > once to examine exposure, and the second adjusted flash > to be captured on film. > > If the FA series lenses are capable of returning focus > distance and lens length, and the meter can examine the > frame's ambient lighting before the flash, why are two necessary? > > Wouldn't it be possible to compensate for ambient and > put out the right amount of flash based on distance > alone? > > -Lon > >
