emerson@bsdpkh.UUCP (Paul Emerson) (01/07/86)
I have aquired 50 feet of Kodalith in 35mm format. Does anyone have any ideas about what kind of exposure I should use, (no information with the film). I intend to use the film for experimental purposes, but I need some kind of reference point to start from. Thanks in Advance. -- "It's better to burnout than to fade away" - Neil Young Paul J. Emerson uucp: ihnp4!bsdpkh!emerson AT&T IS (Orlando FL) Compuserve: 72355,171 Delphi: EMERSON
jer@peora.UUCP (J. Eric Roskos) (01/14/86)
> I have aquired 50 feet of Kodalith in 35mm format. Does anyone have any > ideas about what kind of exposure I should use, (no information with the > film). I intend to use the film for experimental purposes, but I need > some kind of reference point to start from. Yes... I use that a lot, from time to time. With my T-70, the algorithm I use is to set the film speed on the camera to its lowest setting (which I *think* is ASA 12), manually meter the exposure for that film speed, then set the aperture one stop wider than what the meter says. Doing this I have managed to produce some interesting photographs in which, for example, the clouds in the sky (on a cloudy day) were fairly normal shades of grey, but everything else was absolute black or white. -- UUCP: Ofc: jer@peora.UUCP Home: jer@jerpc.CCC.UUCP CCC DNS: peora, pesnta US Mail: MS 795; CONCURRENT Computer Corp. SDC; (A Perkin-Elmer Company) 2486 Sand Lake Road, Orlando, FL 32809-7642 "A people without history is not redeemed from time, For history is a pattern of timeless moments." --TSE
davis@umn-cs.UUCP (01/18/86)
[] I have enjoyed using Kodalith for the past few years, but I must admit some of the enjoyment has come from the need to treat this film with tender loving care as far as exposure goes. Here is how I do it: 1. Set camera (or other) meter to 80 ASA 2. Meter exposure with gray card (ESSENTIAL!) at this setting 3. Add 6 stops to this: e.g. if metered reading is 2 sec at f/22, expose at 2 sec, f/2.8 However as 2.8 is wide open for my 105/2.8micro, I usually go for 8 sec at f/5.6 4. All this gives a starting point only. Plus lith exposures need to be within 1/3 stop accuracy, hence I bracket in at least 1/2 stop increments (1/3 stop settings are hard to set!), plus and minus 1.5 stops around this. Unfortunately, step 4 chews up film very fast, so for each lith session (in which I typically shoot 30 originals) I do this testing on a 10-exposure roll. Once the setting has been standardized, I use regular 36 exp rolls, but still bracket with two exposures of each orginal, about 1/2 stop apart. Hence, I find it useful to load bulk film into two sets of cassettes: one with 10, the other with 36. I find it necessary to re-standardize at every sesson because slight dimming of copy-lamps screws up the previous settings, and the film is very sensitive to the developer mixing accuracy, temperature and exhaution. (I use Kodalith AB developer.) I mix about a liter of the developer per session, which gives me 3 runs with my 300ml tank, and use the developer one-shot only. The other variables remain tolerably constant within one shooting session. It sounds painful (and sometimes is), but the results are always worth it! p.s. In a pinch (when I am out of lith film), I have used Tech Pan with D19 with fairly good high contrast results. Jay ARPA: scit003@umn-ucc-va.ARPA