M42 Screw Mount SLR Lens Mount to Canon EOS (EF, EF-S) Mount Camera Body Adapter, M42-EOS PRO - K&F Concept
uxcell 10 Pcs S Mount M12 Board Lens Holder 20mm Screw Spacing Black for CCTV Camera : Amazon.ca: Electronics
Nikon S-mount - Wikipedia
S Mount (M12) Lens Holder | Teledyne FLIR
Fotodiox Pro Lens Mount Adapter Compatible with Exakta, Auto Topcon SLR Lens to Canon EOS (EF, EF-S) Mount D/SLR Camera Body - with Generation v10 Focus Confirmation Chip | Walmart Canada
K&F Concept AI G AF-S Mount Lens to Fuji FX X-Pro1 XT4 X-M1 X-A1 X-E1 Camera | Lens Adapter - K&F Concept