Archived posting to the Leica Users Group, 2000/05/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]on 17/5/00 10:24 pm, Mark Rabiner at mark@rabiner.cncoffice.com wrote: >> >> Step 1. find Circle of Confusion for lens: CC= 1000/FL (use FL expressed in >> mm, not inches or cm) >> Step 2. find Hyperfocal Distance: HD=(12xf)/(FLxFL)x(CC/1) >> Step 3. find the nearest DOF point: NP=(HD+FD)/(HDxFD) >> Step 4. find the farthest DOF point: FP=(HD-FD)/(HDxFD) >> >> Yes, it's that easy. Who needs those modern DOF scale gadgets! >> :-) >> >> Carpe Lumen, >> >> Michael E. Berube > > FUNNY!!!!!!! > LOL > Mark Rabiner > call me Spock! Actually, I have a tiny Excel spreadsheet that I made to use exactly this formula. Works great! Like, for streetshooting, I can figure out just how good my guesstimating has to be on the 35 wide open at ten feet... something you definitely CAN'T do from a DOF scale. - -- Johnny Deadman photos: http://www.pinkheadedbug.com music: http://www.jukebox.demon.co.uk