Kostas, I don't recall seeing the reason you need to add two grades of filters. Are you missing some grades? Anyhow, as has been pointed out, there are several ways to make an image harder or softer besides filters. I think I have tried just about everything to print panoramas. A negative can have a very wide range of contrasts because the camera rotates. The methods can be applied locally or over-all. One of the easiest is two bath (soft and hard) development. Another is flashing with non image light. Others include faint bleaching, toning, blue/green light, and warm or cool enlarger lamps. The important thing is to not let the picture look obviously forced and out of joint. BTW The negative can be selenium toned to increase contrast too. AZ Build a Lookaround! The Lookaround Book, 2nd ed. NOW SHIPPING http://www.panoramacamera.us > -------- Original Message -------- > Subject: Re: Enlarger filter question > From: "Walter Holt" <locnleave@xxxxxxxxxxx> > Date: Sun, January 16, 2005 6:43 pm > To: "List for Photo/Imaging Educators - Professionals - Students" > <photoforum@xxxxxxxxxxxxxxxxxxxxxx> > > Jim, > You are preaching to the choir. I fully understand what you are saying > as I started using VC paper in 1959 (DuPont Varigam I think). > I was not the one asking about the blending or adding of VC filters, > that was Kostas. Personally I think it would be a poor idea. > > In my own darkroom I Use an Ilford Ilfospeed Multigrade enlarger head > and control box. I just punch a button to change contrast. I am not > unsure, but I do experiment experiment, and have fun. > Walter > ======================================================================== > ============================== > On Saturday, January 15, 2005, at 06:44 PM, Jim Thyer wrote: > > > Walter, > > > > I am not sure you are correct in your description. > > > > Consider what each filter does, remembering NO FILTER corresponds to > > grade > > 2, but as the filters are designed to work with a uniform exposure time > > (from 0-3 1/2 grades) there must be some neutral density as well as the > > yellow or magenta filtering to maintain the same exposure times. Low > > contrast filters use yellow, to filter out the magenta, so adding No 1 > > plus > > No 2 filters gives the neurtal density filter (2) plus some yellow (1) > > resulting in the same amount of yellow filtration but a longer exposure > > required, i.e. still equivalent to a No 1 filter. > > > > Combining filters with numbers below 2 (yellow) and above (magenta) > > basically add neutral density requiring longer exposures, with the > > filter > > allowing most of its colour through controlling the contrast. > > > > If you tried combining filters 0 and 1, you are reducing the magenta > > further, but if the 0 filter already excludes all magenta then the > > addition > > of filter 1 will have no effect, other than increasing exposure. > > > > Trying the same with filters in the range 3-5 is more complicated, as > > from > > 4-5 there is a required increase in exposure time needed for the paper. > > > > My reference to filter 2 being equivalent to no filtration is based on > > the > > Ilford Ilfospeed Multigrade II book. > > > > However, as others have mentioned, there are techniques of printing > > different sections of the print using different filtration to perhaps > > increase the contrast of just the clouds in the sky, or of split grade > > printing which uses exposures of Filter 0 to bring the paper to a > > "threshold > > point" and then a higher grade to improve highlights. One reference > > is the > > book by Harry Fearn, "Better in Black and White" ISBN 1 873319 30 4.I > > may be > > able find some further references if needed. > > > > But if unsure, experiment, and have fun. > > > > Jim Thyer > > ----------------------------------------------------------------------- > > ----------------------------------------------------------------------- > > -------------------- > > > > ----- Original Message ----- > > From: "Walter Holt" <locnleave@xxxxxxxxxxx> > > To: "List for Photo/Imaging Educators - Professionals - Students" > > <photoforum@xxxxxxxxxxxxxxxxxxxxxx> > > Sent: Sunday, January 16, 2005 6:47 AM > > Subject: Re: Enlarger filter question > > > > > > Kostas, > > I assume your talking about the filters to change the contrast in B&W > > printing. > > A #2 plus a #1 would give you a #1.5. Think of it this way, a #2 would > > give you normal contrast and a #1 would give you less contrast. > > The #1 filter will lesson the contrast that the #2 alone would have > > given you. > > > > A #3 filter is more magenta than a #2. Adding a #1 and a#2 will give > > you less magenta than the #2 alone. A #4 and a #2 would probably give > > you the contrast of a #3 filter. > > > > A full set of filters should include all the filters from 1 through 5 > > plus all the half steps between. > > Walter > > > > ======================================================================= > > = > > ============================ > > On Saturday, January 15, 2005, at 04:01 AM, kpp@xxxxxxxxxx wrote: > > > >> a quick one. > >> Can enlarger filters be combined? i.e. is no1 + no2 together a no3? > >> thanks, kostas > >> > >> > >> ______________________________________________________________________ > >> _ > >> ______________ > >> http://www.mailbox.gr ÁðïêôÞóôå äùñåÜí ôï ìïíáäéêü óáò e-mail. > >> http://www.thesuperweb.gr Website ìå ÁóöáëÝò Controlpanel áðü 6 Euro > >> êáé äþñï ôï domain óáò! > >> > >
