You know about this site don't you. http://kmp.bdimitrov.de/lenses/primes/normal/index.html It has minimum distances for Pentax k-mount lenses. Regards, Bob S.
On Sat, Jul 16, 2011 at 12:03 PM, Darren Addy <pixelsmi...@gmail.com> wrote: > Two questions: > Forgive my ignorance, but is there a formula or table somewhere > telling me what sort of minimum focus distances can be achieved with > different Takumars with the various Pentax extension tubes, or does > one simply have to experiment? > > Seems like somewhere there should be someone who quantified it, but maybe not. > > DOF can be calculated knowing the focal length, f-stop, subject > distance and film/sensor size > http://www.dofmaster.com/dofjs.html > but is there a similar calculator that takes into account extension amount? > > Darren Addy > Kearney, Nebraska > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
