On Wed, Apr 22, 2009 at 03:15:24PM -0400, Christian scripsit: > Graydon wrote: >> Which is certainly a good thing, but _how_? What about the matte >> screen indicates that you're in focus, or the location of the plane >> of focus, or similar? > > Ummm, because the image in the viewfinder looks sharp? Your eye and > brain indicate that it's in focus sending a signal to your right index > finger to trip the shutter.
This is where I get into the potentially-defective-brain issues. Sport optics focusing is not a problem; I can pick the wee chirply bird out of the thicket. When I try to do this with the camera -- move the plane of focus so it runs through the bird and not vegetation in front of or behind the bird -- I can sometimes do it with the split screen because I can use the split to edge-detect the bird; if the line of the bird is broken, the focus -- despite looking fine so far as my brain is concerned -- isn't quite right and the picture comes out with a blurry bird. With the shipped matte screen of the K20D, I saw the image as sharp when it (from the camera point of view) was not; it looks like if the plane of focus was 5cm wide, I'd see the image as sharp over between 20cm and 50cm (depending on distance) of space in front of and behind that plane. Drove me dotty. -- Graydon -- 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.
