I'm not going to claim any special knowledge, but my *istD has the same button and I was recently given my first AF lens....pressing on the button allows me to autofocus without having my finger near the shutter button. My husband finds it useful, since his thumb rests there, but it's a bit of a stretch for me. I don't know, but it seems useful to be able to focus without fearing taking a picture, and also allows you to have a good firm grip on the front of your camera with all fingers. Also, keeping your finger on it gets continuous autfocus going.
Again, I just switched over to digital, and only recently got my first AF lens....so, I don't know. :) rg2 On Sat, Oct 4, 2008 at 2:16 PM, John Celio <[EMAIL PROTECTED]> wrote: >> It dawned on me that of all the buttons on the back of the K20, the >> one I've never ever hit is "AF". Its effect seems identical to >> squeezing the shutter a bit. So I went and looked around in the >> manual; it entirely escapes me why this button exists and what you'd >> use it for. So obviously I'm missing something... -T > > I discussed this with some of my former camera sales coworkers a couple > years ago, and we came to the unscientific conclusion that it's there to > appease the easily-impressed consumer who just likes having more buttons. > > It's entirely possible that the button has awesome, photo-changing features > (such as ugly face fixer, suspicion reducer, or perhaps even clothes > remover), but I too have never used it. > > John > > -- > http://www.neovenator.com > http://www.cafepress.com/neovenatorphoto > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > 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 PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
