Hackaday

A hacker built a programmable aperture system by embedding a small computer and repurposed LCD screen inside a DSLR-to-mirrorless lens adapter. By removing the LCD's backing layer to make it transparent, the screen functions as a controllable aperture that can create effects impossible with traditional iris apertures—like cycling through different image areas, selectively opening or closing arbitrary portions, and more. The computer controls the LCD via external buttons, enabling photographers to experiment with novel optical effects.

A Computer That Fits Inside A Camera Lens