Aperture. Of course, you can use focal-length / f-stop, but that is really just another way of expressing aperture.
As I have mentioned in the many DOF discussions on this list the only things that affects DOF are aperture and magnification. All the other values are just more complicated ways of expressing those two values. This assumes, of course, that we are using the same value for circle of confusion (typically 0.01 inches on an 8x10 print viewed at 10 inches). Why everyone wants to discuss DOF on the negative is beyond me, ever see a negative mounted on the wall? Ciao, Graywolf http://pages.prodigy.net/graywolfphoto ---------------------------------------------------------------- ----- Original Message ----- From: Chris Brogden <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, April 09, 2002 3:02 PM Subject: Re: Using external lightmeter with a Zoom lens... > So if aperture and f-stop are two different terms, which controls DOF? - 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 .
