On Fri, Sep 11, 2009 at 10:18 PM, Godfrey DiGiorgi <[email protected]> wrote: > > I guess the "what is maximum aperture" information is no longer needed > if you consider "X amount of light hitting the sensor now, N-stops > down will hit it at exposure time" and calibrate the positions of the > levers accordingly ... Nikon later did the same thing with the later > AI system coupling, if I'm not mistaken. > -- > Godfrey
That's pretty much the case. Only non-TTL or Matrix metering needs to know max aperture. AI actually has maximum aperture communication via the Max Aperture Indexing Post, but it was rarely used, only the FA and F4 used it for ambient metering (It enables matrix metering) and the EM and FG use it for flash. -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
