Sony LA-EB1 E/B4 Mount Adaptor for FS7/FS7II - Newsshooter
Amazon.com : B4 to NEX Adapter Compatible with for Canon Fujinon 2/3" Lens to &for Sony E Mount NEX Camera A6400 A7III A7RIII Alpha a9 Alpha 7R Alpha 7 A6300 A7SII A7II
B4 (2/3) ENG Cine Lens to Sony CineAlta FZ Cameras - Pro Lens Adapter – Fotodiox, Inc. USA
B4-Nikon Z Adapter | Pixco - Provide Professional Photographic Equipment Accessories
B4 to MFT 1.1x Adapter with corrective glass (Plastic ring, Metal mount) - Multicam Systems
B4 2/3" to Sony E-Mount Adaptor | LensAdaptor
Fotodiox Mount Adapter For B4 Lens To Sony Fz Mount Camera Camera | eBay
Sony LA-EB1 E/B4 Lens Mount Adapter for Sony FS7/FS7 II LAE-B1
Fotodiox Inc. B4-FZ-PRO B4 To Sony FZ Mount Pro Lens Mount Adapter | Full Compass Systems