I've used the moire patterns to confirm results but not in isolation. I've found the focus charts work fine as long as the results are carefully analyzed on the computer monitor, although it can be difficult with anything wider than about 35mm. Paul
On Apr 11, 2011, at 11:00 AM, Rick Womer wrote: > I've given up on focus charts--way too slow and hard to judge except with > fast lenses. > > Using moire patterns, though, works beautifully. Here is the info: > > http://www.northlight-images.co.uk/article_pages/cameras/1ds3_af_micoadjustment.html > > or > > http://tinyurl.com/6e4yng > > Rick > http://photo.net/photos/RickW > > > --- On Mon, 4/11/11, Paul Stenquist <[email protected]> wrote: > >> From: Paul Stenquist <[email protected]> >> Subject: Re: Focus chart help, please >> To: "Pentax-Discuss Mail List" <[email protected]> >> Date: Monday, April 11, 2011, 7:09 AM >> >> On Apr 11, 2011, at 12:49 AM, Christine Aguila wrote: >> >>> >>> ----- Original Message ----- From: "William Robb" >> <[email protected]> >>>> >>>> I use a similar method to yours for dialing in >> lenses. I focus on an object (in my case a clock dial) at >> some distance from the camera using center point AF, and I >> then adjust AF by how well what I was focusing on is in >> focus. >>> >>> >>> >>> Thanks for suggesting this. I think I'll use >> this method from now on. Cheers, Christine >> >> Although without any indicators in the foreground or >> background, how can one tell whether the camera is front >> focusing or back focusing? With a chart that is at 45 >> degrees to the camera, you have a scale to work with. And as >> long as the chart has a good target in the center and the >> camera is set to single-point autofocus, I don't see what >> can go wrong. The clock can show that you're not achieving >> good focus, but it can't tell you which way to go with the >> adjustment. >> Paul >>> >>> -- >>> 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.
