You need a highly compensating developer (high dilution and infrequent agitation) or the water-bath technique used by Ansel Adams. Both have the effect of exhausting the developer in heavily exposed areas before development has proceeded to a very high density, while continuing development in the lightly exposed areas of the negative. RKS
>From: Gene Johnson <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] >Subject: Re: [Cameramakers] Developing ortho copy film, (was Halation) >Date: Thu, 15 Nov 2001 07:38:57 -0800 > >Alan and list, > >I printed some of the negatives from the copy film last night and was >very disapointed. Like I said before, the parts that had reasonable >density on the neg were pretty impressive, but the great majority of the >frames were either almost blocked up or super thin. I have to compress >the contrast somehow. I'm going to take one more stab at the Rodinal, >and my guess is to try less development. Maybe go from 10 min to 6 or 8 >min. After that, I still have the message from Rick Dingus outlining >the use of HC110 for this purpose, and will give that a try in any >case. I also had something from Masrc, but I can't find that now. >Marc, if you wouldn't mind sending that again, I'd love to have it. Kind >of fun, all it costs is the developer. I really have to finish my 4x5 >project now, since being able to develop one sheet at a time (under a >red safelight!) would make the experimentation easier. > >Gene > >Alan Zinn wrote: > > > > At 12:14 PM 11/13/01 -0800, you wrote: > > >Hello all, > > > > > >I've just finished developing a roll Kodak High Resolution Aerial Copy > > >film. I had cut and rolled a strip of it and put it in my old > > >Rolleiflex. I took a series of shots of the landscape in front of my > > >house to get an idea of the film speed. The resulting negatives are > > >certainly interesting. The cloudy sky is very dense compared to the > > >ground, which I expected. But something strange has happened I cannot > > >explain. I have much more detail of the houses etc. at 8 and 4 sec and > > >also at 1/2 sec. At 2 sec and especially at 1 sec the ground detail is > > >almost gone. This film has no antihalation backing. To look at it it > > >is yellow and almost transparent. Could this be halation? I have no > > >idea what halation looks like on the film. If anyone is curious, the > > >images that look like they are exposed about right have amazing detail. > > >I didn't know the little Tessar in my Rolleiflex was that good. I will > > >let you all know what happens when I try to print these. That should > > >happen in a couple days. I have 500ft. of this stuff, and my plan was > > >to cut a bunch of 4x5 sheets from it. Looks like it works well at >about > > >ASA 2-6. I developed it in Rodinal for 10 min at 20 deg C. > > > > > >Gene Johnson > > >_______________________________________________ > > >Cameramakers mailing list > > >[EMAIL PROTECTED] > > >http://rmp.opusis.com/mailman/listinfo/cameramakers > > > > > > > > Gene, > > I used a variations of this film years ago. It is phenomenal for certain > > light situations but without the halation backing it is quite squirrely. >I > > think it is more sensitive to I/R. It is best in overcast light and does > > well with foggy weather. It has a pronounced adjacency effect in sunlit > > scenes. I have 35mm pictures that are almost unbelievably fine grained. >The > > negs are sort of erie and beautiful without the halation backing. > > > > AZ > > Maker of Lookaround panoramic camera. > > > > www.geocities.com/soho/gallery/8874/ > > or > > keyword.com lookaround > > > > _______________________________________________ > > Cameramakers mailing list > > [EMAIL PROTECTED] > > http://rmp.opusis.com/mailman/listinfo/cameramakers >_______________________________________________ >Cameramakers mailing list >[EMAIL PROTECTED] >http://rmp.opusis.com/mailman/listinfo/cameramakers _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
