Extended Lens Data thread/coating/era/shutter type
Lens metadata: filter thread, era, coating, shutter type, and aperture/shutter bounds.
Where to find it
Gear picker details; Lens info card
Summary
The bundled lenses.json carries full metadata per lens: shutterType, minShutterSec, maxShutterSec, maxAperture, minAperture, filterThreadMm, era, coating. CameraSpec stores shutterType and shutter bounds for bodies.
Detail
How it works
Each lens in the database has full specs: aperture range, shutter type (leaf or focal-plane), filter thread size, approximate age (era), and optical coating info.
Why this matters
You can distinguish between a 1950s uncoated lens and a 1990s multi-coated version. You know a leaf-shutter Hasselblad 80mm clocks out at 1/500, not 1/4000. You can note the filter thread (say, 77mm) so you buy the right UV filter.
Body specs too
Camera bodies carry their own shutter type and mechanical limits, stored in CameraSpec. A Nikon F3 has a focal-plane shutter with 1/200 flash sync; a Pentax 67 might be 1/125 with a leaf-shutter lens.
Where it's used
The Ranges tab and Equipment modal use this data to build the shutter and aperture bounds. The Flash Sync advisory pulls the flash sync speed for the selected body.