I hereby refuse to get into this one again, and again, and again... GRIN!
--
Rob Studdert wrote:
On 19 Jul 2004 at 20:08, Don Sanderson wrote:
Having said what I did in my post below I guess I'm agreeing with 4 things at once: 1.) DOF is dependent on image size to subject size ratio, and aperture.
2.) That the final "working image" is dependent on FL, Distance and Format. Smaller formats have a greater apparent DOF simply because they require a shorter FL, at the same distance, to achieve the final "working image". Of course this assumes the aperture is constant.
3.) Of course the smaller the "working image" the more enlargement is needed to acheive the same size final image.
I carefully didn't mention what media was used, this is agreement #4: Doesn't matter what the media is, just how good its resolving power is. More and Finer Grains or More and Smaller Pixels, who cares as long as it works better!
IOW DOF scales just serve as a rudimentary guide.
Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
-- graywolf http://graywolfphoto.com/graywolf.html
