openspec/changes/archive/2026-09-10-add-lens-metadata/proposal.md
add-lens-metadata
ACTIVE BUILD
Why
Matchmove, AD, and splat-readiness need real focal length, T-stop, and focus, not a scripty guess. Cooke /i is the cine interchange.
What
- /i-class stream from each camera, sidecar JSONL 1:1 with HEVC
- Body: PL pins or barrel port; sats: barrel /i → Ethernet (Lockit+ class)
- Capability:
hardware-kit
Impact
- Capabilities: ADDED lens metadata
- ADRs: none
User journey & surfaces
No new UI because this is a sidecar next to picture. Continuity and VFX read the JSONL; the EVF may overlay T-stop later.
Out of scope
- Implementing a /i parser in this change
- Buying Lockit+ / PL reader SKUs (datasheet pack)