As a matter of fact they do use stop-down metering in one case, P-TTL flash exposure.
-Adam J. C. O'Connell wrote: > Then why arent the A/F/FA lenses using stop > Down metering too? Why not, I will tell you > Why not again (listen this time ), the benefits > Of open aperture metering and AE far outweigh > The tiny tolerance error of the aperture > Cams and the TOLERANCE ERROR of body controlled > Of aperture setting which is probably much > Worse than the cam sensor tolerance error > Was or will be. Even with critical slide film > Or digital. > jco > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > William Robb > Sent: Sunday, October 22, 2006 6:46 PM > To: Pentax-Discuss Mail List > Subject: Re: The JCO survey > > > ----- Original Message ----- > From: "J. C. O'Connell" > Subject: RE: The JCO survey > > >> Wrong open aperture continuous automatic >> Exposure is faster than GB and open aperture >> Metering is insignifigantly different from >> Stop down in bright light and far superior >> In low light. That's why stop down metering >> Was abandoned by all the SLR manufacturors >> Around 1970, 35 Years AGO, > > > Faster, but not significantly, and you are correct about it being an > issue in low light. > It can't help but be more accurate within the meter's EV range, as it is > > metering at the taking aperture, not guessing as to whether the > mechanical linkage is within tolerance. > This may not make a lot of difference, but then again, it might, and > digital is pretty exposure sensitive. > > William Robb > > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
