Tuesday, February 08, 2011

Pinhole Testing

Test shots from the pinhole camera I just built out of foamcore board. It uses 5x7 sheets of black and white paper as the negative that are then scanned and inverted in Photoshop.

The paper was developed in a makeshift darkroom in my bathroom. I've been missing the darkroom for a while, but didn't want to deal with film negs and enlargers.

At least with a pinhole camera I have an excuse for shitty looking prints.

Exposures with paper are way slower than film. The ISO rating falls somewhere between 3 and 6. Based on the size of the pinhole and its distance from the paper, my f-stop is over 250.

After all that, reciprocity failure starts to kick in after 30 seconds.

The very first paper negative that managed to get a workable exposure (not shown)was in a room lit by regular tungsten bulbs and took over 5 hours to expose.

Click to embiggen.


This shot took about an hour



This was a 1 minute exposure in the shade of 'sunny 16' conditions


Now I need to build a camera that's tri-pod mountable and sturdy enough to use outside.

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