Archived posting to the Leica Users Group, 2011/01/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have willed that part out of my mind. I did make a spreadsheet with the formulas for front and back focus (Lotus 123 in those days instead of Excel). Here are the calculations: http://www.dofmaster.com/equations.html I like autofocus better. Ken On 1/3/2011 8:58 PM, Mark Rabiner wrote: > Which circle of confusion did you pick? > > > -------------------- > Mark William Rabiner > Photography > http://gallery.leica-users.org/v/lugalrabs/ > mark at rabinergroup.com > Cars: http://tinyurl.com/2f7ptxb > > > > >> From: leo wesson<leowesson at gmail.com> >> Reply-To: Leica Users Group<lug at leica-users.org> >> Date: Mon, 3 Jan 2011 20:41:38 -0600 >> To: Leica Users Group<lug at leica-users.org> >> Subject: Re: [Leica] What are the most important aspects of a photographic >> image ? >> >> Who? >> >> Thanks! >> Leo Wesson >> 817.733.9157 >> www.leowesson.com >> >> >> On Jan 3, 2011, at 19:30, Ken Carney<kcarney1 at cox.net> wrote: >> >>> My first photo seminar was with a Famous West Coast Photographer. His >>> advice >>> was ditch the 35mm and get a real camera (I think I brought an M3 and a >>> couple of Summicrons, or maybe a Contax to the class, but definitely >>> TriX). >>> So I bought a nice 4x5 field outfit, a Linhof Technica and lenses, and >>> for >>> good measure an 8x10 rig also. The focus part was a little tedious. >>> Once >>> you knew the distance to the target, you pulled out a little chart for >>> each >>> lens that showed the range of focus for each stop, based on your desired >>> circle of confusion. Then you measured the various zones, which gave >>> you the >>> key to the ISO for that shot and thus the development time for that >>> particular sheet, based on your densitometer tests. After, of course, >>> you >>> had consulted your reciprocity failure chart. Sometimes it happened >>> that by >>> the time I made the exposure everything of interest, including the >>> light, had >>> vanished. Then the light bulb began to flicker on that something >>> more...immediate...m >> ight be appropriate. Then, Gracia Dios, along came digital and the >> exposure >> comp dial. >>> Ken >>> >>> >>> >>> On 1/3/2011 6:33 PM, Mark Rabiner wrote: >>>> I think its nice to get the thing in focus most the time. >>>> >>>> >>>> -------------------- >>>> Mark William Rabiner >>>> Photography >>>> http://gallery.leica-users.org/v/lugalrabs/ >>>> mark at rabinergroup.com >>>> Cars: http://tinyurl.com/2f7ptxb >>>> >>>> >>>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >