Large Format course

September 24, 2011

Images from the Large Format course run at the ACP in September 2011.

Classic sunny 16 light. This was a test shot with Fuji FP 100C 45 instant film in the PA45 holder. Graflex Optar 135mm lens on my Crown Graphic, using maximum front rise.

We exposed two sheets of Fuji Acros 100 after doing the Instant film. The two B&W exposures were made to explore the flexibility of this film in high contrast conditions. Superficially you might think the 100 ISO B&W film should be exposed the same as the successful instant film – f/16 @ 1/100. Many film exposure data sheets will suggest the same. The sunny 16 rule is useful but does tend to bias exposure for the highlights, which is good for positive film and digital jpeg. With B&W neg film we have the option of exposing for shadow detail and then developing for the highlights. The photo below was Acros exposed at exactly the same setting as the instant film. The photo above was given 2 stops more light – f/16 at 1/25. Gathering the extra light gives nice detail in the shadowed vine on the lower wall, however 2 stops extra light from the sky and other light tones might result in them blowing out, i.e. getting too dense. Therefore I pulled the film by reducing the developing time. The first sheet was processed in Xtol 1:1 for 10.5 minutes while the second sheet was done for 9.5 minutes.The second time was an estimate as I’ve never pulled Acros before, but I thought it should be close enough. Neither of the exposures is right or wrong – they are both possible interpretations of the scene and each photographer would decide which look they prefer. The important thing is to know what is possible.

Looking at bellows extension for close focus still life. Kodak Ektar 203mm lens on 45 Crown Graphic. I think the bellows was at 300mm and we opened up one stop to compensate. Fuji Fp 100C 45. It is this blue.

8×10 portraits. Brent W. Deardorff 8×10 with Rodenstock Symmar 300mm f/5.6 lens. Close focus required 450mm bellows extension and thus one stop extra exposure to compensate for bellows light loss. Exposure was f/5.6/8 at 1/4 second on Ilford HP5. Processed by rolling in a Jobo 2830 tank. 100 ml of Xtol 1:1 – very efficient – only 50ml of dev to process a sheet of 8×10. Dev time was 13 minutes at 20 degrees C. Neg is OK but I think could use a bit more density in the highlights. I may have been a bit absent minded and slacked off with the drum rolling. That’s the dilemma with rolling dev compared to intermittent agitation – you have to stay engaged the whole time. I can see how a machine would make like easier.

Adam H. Same exposure as the first portrait. I processed this one for 15 minutes to build more highlight density. It is a better neg. Just a test shot but I like his regard. Neg scanned on an Epson V700 on the glass using the film area guide. Emulsion side down – no Newton rings.

Above: Adam N. same exposure, 13 mins in Xtol 1:1 Adam also brought along his own Tri-X 320 in 8×10 and decided to push it 2 stops. Same aperture but at 1/15 sec. He had it developed elsewhere so I’m not sure what processing was used, however he has kindly allowed me to show the result below.Realistically, it’s more like a 3 stop push as I didn’t account for the slightly slower speed of the Tri-x 320. I’m so used to Tri-X as being a 400 ISO that I went two stops under the HP5.


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