24mm “borescope” type lens with a front LED light.
It has been designed to with with liquids (it’s waterproof) and is also appropriate for hostile environment such as dusty or sandy.
Laowa 24mm f/14 2X Macro Probe
Focal length: 24mm
Aperture: f/14
Viewing angle: 85°
M.O.D.: 20mm
Max. Magnification: 2x
Focus mode: Manual
Filter thread: N/A
Mount: EF/ E / PL
Dimensions: 38x408mm
Weight: 474g
