Around January 2011 I began working on the Mark IV Time-Lapse Pinhole Camera model. The aim was to simplify the mechanism down to its most basic design and reduce any excess weight on the 24hr clock. Again housed inside a wooden nestbox, Mark IV used a toilet roll tube as a shutter, with the film canister pinhole camera suspended from the lid. I used Mark IV cameras to produce the series Burghley Lunar-See (2013).

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Image shows pinhole camera attached to the roof of the nestbox (upside down) Copyright Anthony Carr

Image shows all three components; clock and shutter, pinhole camera attached to roof of nestbox (upside down) and the nestbox. Copyright Anthony Carr

Image shows pinhole camera inside nestbox, and clock and shutter separately. Copyright Anthony Carr