Archived posting to the Leica Users Group, 2000/05/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Johnny Deadman wrote: > > 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, ><Snip> > > 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 So Mr. Deadman! You've got your trusty laptop in your camera bag with your M6!? Where does that spreadsheet appear? Inside your VR glasses!!! Mark :-) Rabiner