Mmm if even the "normal" Katzeye screen means exposure errors I might well think about it a bit more. I'd like to focus more easily but 80% of the time at least, I use AF lenses and still will in the future.
2007/2/11, John Francis <[EMAIL PROTECTED]>: > On Sun, Feb 11, 2007 at 10:32:37AM -0800, Godfrey DiGiorgi wrote: > > > > That said, if you use *only* older lenses with the green button stop- > > down metering, you *might* find that exposure accuracy improves. Some > > have reported that fitting a DS screen solved this K10D problem ... > > It might be that the exposure system recal they did for the other > > modes is not applied to the stop-down metering mode erroneously. > > > > Godfrey > > >From what I read on dpreview that isn't the case - in fact metering > is quite likely to be *worse* with old lenses on the K10D, no matter > what screen is in the camera. > > The extra viewfinder brightness in the K10D comes with a cost; a > very non-linear change in illumination on the metering photocells > with aperture. The K10D is programmed to automatically compensate > for this, but to do so it needs to know the metering aperture. > With older lenses it doesn't know this, so presumably it uses > some fixed default value. If this doesn't match the actual > aperture being used then there's going to be a metering error. > > Some user reports suggest that the problem is most noticeable > with fast lenses being used wide open. If that is the case then > errors from stop-down metering presumably become reasonably linear > at small apertures. Fitting a DS screen will change the size of > the fixed part of the error, but will do nothing to help with the > way the error varies with aperture. > > I'd suggest sticking to spot metering when using the green button. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > -- Thibault Massart aka Thibouille ---------------------- *ist-D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
