there is no mechanical coupling between the DOF preview button and the aperture mechanism. it is just a switch that causes the lens to stop down to your shooting aperture. the *ist works the same way.
Herb.... ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, August 22, 2003 04:28 Subject: Re: *ist-D Brochure > What is this "Electronic preview" in the specs and brochures? > > DOF-Preview? >
