Rob wrote:
>But DOF is not an issue for focussing - the camera focusses wide open. >It doesnt stop down until you take the shot. DOF can theoretically compensate for slight focusing errors but usually it doesn't come into play because AF system takes it into consideration. See below... >When you talk about the >subject leaving the plane of focus before the shutter fires this is >shutter lag. Lens performance aside, the camer always gets the subject >in focus at f2.8 if it is an f2.8 lens. For moving systems you use predictive AF. It takes subject movement, AF speed and shutter lag into consideration when calculate the plane of focus. If you use this feature every image will seem unsharp in the viewfinder but every image should be sharp on the film. This is because the image is only in focus the moment when the shutter opens. I wonder if many who dismiss AF systems are just testing them out with no film in the camera. A Pentax camera like the Z-1p and the MZ-S will seem hopeless for moving subjects in the viewfinder, never getting the image in focus, but the resultant image should be just fine. P�l - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
