Amazon.com : Venus Laowa 24mm f/14 2X Macro Probe Lens with Built-in Ring Light for Canon EF : Electronics
Laowa 24mm Probe f/14 - Duclos Lenses
PROBE LENS - The most USEFUL, yet USELESS lens in the WORLD! - YouTube
Amazon.com : Venus Optics Laowa 24mm f/14 2X Macro Probe Lens with Canon EF Mount : Electronics
Venus Optics brings 3 Laowa prime lenses, including its wild 24mm F14 Macro Probe lens, to Canon RF and Nikon Z mount cameras: Digital Photography Review