Because you can set the AF system so it's not activated by the shutter half-press, but only by the AF button. That configuration works very well with lenses that have Full-Time Manual focusing like most DA's, it gives you manual focus with AF when you want it.
In fact that's how my D300 is currently configured. -Adam On Sun, Aug 3, 2008 at 1:51 PM, Jens <[EMAIL PROTECTED]> wrote: > Annother button question: Why do we need an AF button on the back side?? > Regards > Jens > -- > Treat others as you would like to be treated yourself. > > On Aug 3, 2008 17:58 "Tim Øsleby" <[EMAIL PROTECTED]> wrote: >> My K20D has a distinct two step feeling. >> 2008/8/3 Jaume Lahuerta <[EMAIL PROTECTED]>: >> > I have noticed a difference between the K20D shutter button action >> > and the rest of AF cameras I own (istDs, Optio W20, MZ-5n...). >> > >> > In the latter, the buttons have 2 clear 'positions'. A first one in >> > order to focus and meter, and a second one in order to actually >> > shot. For both one has to push and one notices that he is activating >> > it (i don't know how to describe it more precisely in English, >> > sorry). >> > In the K20D unit I am testing, the first 'push' is unnoticeable, I >> > mean, the only resistance that one notices in the button is for the >> > actual shooting. This means that the slightest pressure on the >> > button already activates shutter and focus. A bit disturbing since >> > all cameras I have used before had these 2 positions (except maybe a >> > Mark III that I hold for a few minutes. I tried to meter and, before >> > even notice it, I had already made 10 pictures or so...) >> > >> > So, is this normal or is this a kind of faulty unit? >> > >> > Thanks, >> > Jaume >> > >> > >> > >> > ______________________________________________ >> > Enviado desde Correo Yahoo! La bandeja de entrada más inteligente. >> > >> > -- >> > 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. >> > >> >> >> >> -- >> MaritimTim >> -- >> 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. > > -- > 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. > -- 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.
