Re: 31 and 35mm lenses tested in German magazine

[Bruce Rubenstein]

I got things a bit jumbled. The AF sensor data is used to determine the distance of the subject. According to Nikon documentation, "The camera's CPU uses the reflected light [monitor preflash] to determine in which of the TTL Multi Sensor's five segments the subject is located, in accordance with the selected aperture and distance." The statement indicates that the algorithm doesn't assume the location of the subject based on which AF sensor was used to determine distance.

BR

BTW, all this fancy stuff is only of much use for simple fill flash. For a decent look, with flash as the main light source, things like diffusers, bounces and brackets are needed and then metering goes to TTL.

[EMAIL PROTECTED] wrote:

Hi Bruce,
the AF sensor cannot be coupled to the 5 segment flash sensor (e.g. for the
F100). The AF sensors are always on the borders which are between the
segments. To be coupled to the AF sensors, the 5 AF sensors must be
distributed like the Contax N1 sensors.

The MZ-S has a preflash measurement with the normal 6 segment metering which
is also coupled to the AF sensor (coupling can be switch off). It calculated
the amount of over oder underexposer for this special situation . During the
flash one intergal sensor which is measures from the film plain?? is
switching the flash off in dependence of the preflash.
regards
R�diger