hobby #225

Camera Lucida Drawing (Prism Optical Tracing)

Building and drawing with a camera lucida — a small prism (or half-silvered glass) on an arm that superimposes a ghost image of the real scene directly onto the paper, so the hand traces contours the eye alone places. Involves grinding/mounting the optic, aligning the split-view so subject and pencil tip fuse, and learning to hold the head still enough that the borrowed image stays registered while sketching outdoors.

The Fence Existed Twice and Only I Could See It

The image isn't on the paper — it's on my retina, which means I spent all morning tracing a ghost and losing to my own heartbeat every time my head twitched a millimetre.

code-a-day tied to this hobby

The Eye Is the Centre of Projection Perspective Projection

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