that's a flexible medium with lots of irregularities compared to the DOF. a digital film body could move the sensor at the same time as it's moving lens elements.
Herb... ----- Original Message ----- From: "Rob Studdert" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, October 14, 2004 8:21 PM Subject: Re: Minolta Maxxum wth BODY IS > No, to maximize mechanical band-width. Have a little think about the rate at > which a CD lens has to move to track the pit and focus when a disc is spinning > at 52x (ie 52x500RPM on the outside edge)