One-shot with Opus 5.5: an interactive lens-optics lab built in 86 minutes for $25.66
JasonDClinton · x · 2026-09-23
Developer Ryan Sael asked Opus 5.5 to explain camera focus by building an interactive lens lab—one shot, 1 hour 26 minutes, $25.66 in API cost, live at lens.lab.sael.net.
The 3D web app opens up a lens: drag the focus ring and watch glass elements shift the sharp plane through the scene, see circles of confusion blur out-of-focus objects, and switch aperture from f/2 to f/16 to watch depth of field change. It even shows the inverted image and supports exploded views of the lens barrel.
Full keyboard controls (focus presets, aperture, cinematic cameras, reset) round it out. It's the latest in a series of one-prompt teaching labs from the same author, including a Rubik's cube visualizer.
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