I used trap focus with the ZX-5, which drops motor/lens speed out of the equation, and the plane of focus still falls behind where the subject is when the shutter fires.
--- William Robb <[EMAIL PROTECTED]> wrote: > Focus is also dependant on how fast the subject moves after the > camera has confimed focus and begins the exposure cycle, as > after the mirror starts to move, AF measurment is impossible. > Predictive AF is the camera guessing about where the subject > will be, based on where the subject has been. It may or may not > be accurate. > Most likely, not. > Oh yes, since it is a mechanism, there must be an element of > slop involved to allow the moving parts to move. Not much, but > we are talking about wavelengths of light as being the limiting > factor for allowable error. Try FREE Yahoo! Mail - the world's greatest free email! http://mail.yahoo.com/ - 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 .
