I'm not sure what is being accomplished here. How do you know which of the two focusing methods techniques is errant?
Is autofocus through the live view system more accurate than autofocus through the lens? It sounds like they are testing for differences in the two focusing systems. The lens is the only constant in the procedure. With the little I know about the focusing system, it seems that the only thing this proves is that the two focusing methods result in either identical or different results. I'm not trying to be argumentative here, I'm just trying to understand. gs George Sinos -------------------- [email protected] www.georgesphotos.net plus.georgesinos.com On Wed, Apr 4, 2012 at 10:17 AM, Jack Davis <[email protected]> wrote: > Yeah..me too. Probably readying their needles as I (two finger) type. ;-) > > Jack > > > ----- Original Message ----- > From: Christine Nielsen <[email protected]> > To: Pentax-Discuss Mail List <[email protected]> > Cc: > Sent: Wednesday, April 4, 2012 7:55 AM > Subject: Re: simple-as-dirt focus calibration method > > A chore I have put off for a while, too. And I think my FA-50 1.4 > could use a little calibrating... I would love for it to be this > simple... I await the bubble-poppers... > > :) > -c > > On Wed, Apr 4, 2012 at 10:37 AM, Charles Robinson <[email protected]> wrote: >> I don't know why I never thought of doing it this way... >> >> My FA-50 1.7 has always given me "surprisingly soft" results and I've always >> suspected that the focus needed to be calibrated but never had the time. In >> the kind of low-light situations where I use it, manual focus is as dodgy as >> auto. >> >> Yesterday I found a website which described a dead-simple way to do it if >> you have LiveView (and the K7 has exactly that). No focus targets or brick >> walls needed. Here's how it works: >> >> 1. Set up a target a few feet away. I used a wine bottle. >> 2. Set up camera on tripod with center focus point selected. >> 3. In Live View, press AF and wait for focus to be locked. >> 4. Turn off Live View >> 5. Press the AF button again and watch which way the focus ring moves. >> Ideally it shouldn't move at all! >> 6. If it does move... go into the focus calibration settings in the custom >> menu and add/remove points. >> 7. Repeat steps 3-6 until the damned ring holds still. Done. >> >> My FA-50 needed seven correction steps to the left (can't remember if that's >> "plus" or "minus") - SERIOUSLY out of whack. My DA-35 only needed 2 steps >> in the other direction. My Tamron 28-200 was dead on as is my 16-50. I >> can't wait to use the FA-50 in another low-light situation to see if it >> nails the focus in a real-world situation now. It never has before. :-( >> >> It was so simple and easy to do I almost wished I had more AF lenses to try >> it on! >> >> If anyone would like to pop my bubble, please go ahead and tell me why this >> isn't the right way to go about it... >> >> -Charles >> >> -- >> Charles Robinson - [email protected] >> Minneapolis, MN >> http://charles.robinsontwins.org >> http://www.facebook.com/charles.robinson >> >> >> -- >> 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. > > > -- > 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.
