I shot this test portrait of my daughter yesterday afternoon with my K10D and DA 35mm f/2.8 Macro Limited. The light coming through the window wasn't bad as this was shot at ISO 100, f/2.8 & 1/80 second.
I focused on her left eye (camera right). Trying to get her (and me) to stand still long enough for the AF system to lock in and fire in AF-S mode wasn't working
at all so I switched to MF and fired as soon as the AF indicator illuminated. After a few tries I was getting too much front & back focusing due to the short DoF so I tried AF-C mode and continuous shutter. After a burst of about 6 images I got this
single keeper. (If you click the photo it should take you to my Picasa page where you can zoom in.)
Accuracy is important. So is speed. Sometimes we need
both for even the most mundane shots.
So, how about if Pentax gave us the
option of disabling the double focus check for those times when speed was more important than accuracy?