Re: Amazing discovery about M lens with TTL flash

[Bruce Rubenstein]

It reads the aperture via the mechanical coupling between the lens and body. This is the same way it's been doing it since open aperture TTL ambient metering was invented. The actual exposure is determined by the amount of light that the meter reads being reflected off the film during the exposure.

BR

[EMAIL PROTECTED] wrote:

Just mounted my masking-taped M135/3.5 (to simulate 'A' lenses) to the Z-1p with Metz 40MZ3i (SCA3701) flash at TTL mode. Just when I was trying to figure out how much flash output I needed, I discovered the flash was able to read the exact chosen aperture on the 'M' lens. This is amazing!! (to me anyway) I always thought the camera was able to determine the exact aperture only with F & FA lenes, when the lens was not set to 'A'. Obviousely I was wrong. But now the question is, if the flash was able to read the exact aperture with 'A' lenses (and masking-taped K & M lenses), how come the Z-1p doesn't display the chosen aperture in the viewfinder? Anyone knows?

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