Ricoh Lens Type B3 (1.2 to 1.5) LENSTYPEB3 B&H Photo Video
Amazon.com : Fotodiox Pro Replacement Lens Hood Compatible with Rollei TLR Camera with Bay III (B3) f2.8 Take Lens - Matte Finish, fits Twin Lens Rollei (TLR) Bay III Mount, 2.8 B/C/D/E/F/GX/FX (
Fotodiox Pro Lens Cap for Rollei TLR Camera with Bay III (B3) f2.8 Take Lens – Fotodiox, Inc. USA
Extremely rare B3 B4 mount adapter correction glass lens bmpcc HD arri 4k gh5 | eBay
BSTOCK Fujinon HA25X16.5BERD-S18 2/3" 16.5-413mm f/2.8-4.0 HD Telephoto Lens for ENG/EFP Camera, 25x Zoom Ratio, 2x Extender, Digital Servo Zoom & Focus, Non-Motorized