This was our second week in the darkroom, this time using medium format roll film in a Hasselblad 503 analogue camera - the camera they took to the moon - with an 80mm lens (www.hasselblad.co.uk).
Our basic lighting set up was to use two soft boxes at 45 degrees - this is also known as Rembrandt lighting, named after the artist Rembrandt because of the way he mastered light in his paintings such as this self-portrait:
The light meter gave a reading of f11 with a shutter speed of 1/250. We (well John actually) decided to use bracketing from f2.8 to f22 to demonstarte the different effect achieved at each f stop.
The exposed film was developed in a 500ml lightproof tank as follows:
- Developer: 1011 multi-purpose (mixed 1:1 with water) - 13 minutes
- Stop bath: water - 1 minute
- Fixer: mixed 1:4 5 minutes
- Wash: water 20 minutes
Details of developing times are given on the inside of the film box:
We finished the workshop by reviewing the negatives and discussing common processing errors:
- fogging can be caused if light reaches the emulsion before or during processing;
- the film can be scratched when loading it into the camera or the processing tank;
- if the water used in processing is jot clean it can leave drying marks (adding wetting agent in the final rinse can help to reduce this);
- agitation can cause foaming, particularly if there is not enough water in the tank, and this can leave bubble marks on the film;
- reticulation can occur if there is the chemicals are not at a consistent temperature;
We left the workshop with a Seagull twin lens reflex camera to use to take some photos for printing in next week's workshop.http://www.camerachina.com/
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