Amazon.com : Fotodiox Pro Lens Mount Adapter, B4 (2/3") Lens to Sony NEX (E-Mount) Camera Body, for NEX-3, NEX-3N, NEX-5, NEX-5R, NEX-6 NEX-7 : Electronics
Image quality with B4 ENG lenses on large sensor cameras. | XDCAM-USER.COM by Alister Chapman
2/3" B4 adapter to E-Mount for FS7/FS7M2, 0.6x Magnification, 2K Center or Full Image Scan Support, 12pin Lens interface for Rec Start/Stop, approx. 430g weight | Periactes
Amazon.com : Pixco Lens Mount Adapter Ring for B4 Lens to Canon EOS R Mount Camera : Electronics
Fujinon HA23x7.6BERM HD B4 Lens | LVRUSA®
Mount a B4 lens on your Micro Four Thirds Camera - YouTube
B4 TV Lens to Sony Alpha E-Mount Camera Body Adapter – Fotodiox, Inc. USA
Canon CJ14EX4.3 IASE w/ SS41 IASD Full Servo | AVGear.com
Fujinon ZA17x7.6BZD-T58C 2/3" HD B4 2/3" ENG lens servo focus / zoom for robotic | eBay