The FotodioX B4 to Sony FZ Lens Mount Adapterallows you to use lenses that feature a B4 mount on a camera body with a Sony FZ mount, such as the Sony PMW F3, F5, and F55. The B4 mount is traditionally used on lenses designed to work with 2/3" 3-imager sensors. This is a lens mount adapter designed to attach to the lens itself; it is not meant to permanently adapt the mount of the camera. The adapter mounts to the lens and is removable, so you can use one adapter on many different lenses.

The adapter ensures the correct flange focal distance, so your infinity focus is maintained. This is strictly a mechanical adapter without any corrective optics. Featuring brass construction with a stainless steel finish, this adapter is a strong, durable unit. There is no electronic control of the lens through the adapter, so you need to use a lens that has manual focus and iris capabilities. However, the adapter allows TTL (Through-The-Lens) metering, and when using a lens with the adapter, the camera body should be set to either manual exposure or aperture priority mode.

Adapts Lenses with B4 Mount    Mounts on Sony FZ Mount    Works with PMW-F3/F5/F55    Maintains Infinity Focus on Lens    Brass & Stainless Steel Construction    For Lenses with Manual Iris and Focus    Allows TTL Metering

Maintains correct flange depth between lens and image plane.

Infinity remains unchanged, so the lens does not need to be re-collimated or shimmed.

Brass construction protects lens mount, stainless steel finish makes the adapter corrosion and wear resistant.

Related Questions and Answers

Q: 1. Will this work on an FS5?

A: Yes it should. The Sony FS5 has an E-Mount.

Q: 2. Is the image circle big enough for 16mm cameras? Could i adapt a newer b4 zoom lens to a vintage 16mm cinema camera?

A: The image circle of the B4 mount lenses that the FotodioX B4 to C-Mount Pro Lens Mount Adapter works with are typically made to cover 2/3" sensors, which are smaller than the super 16mm format.

Q: 3. Will this work on an Fx9?

A: Yes, the FotodioX Pro Lens Mount Adapter B4 to Sony E Mount will support and work with the SONY PXW-FX9.

Q: 4. Would this work on a Sony A7s?

A: How could there be a software in a lens adapter when there are no electronics in the adapter ?

Q: 5. Can I use it with an HD Cine lens that does not have a 2x internal extender, but I add a 2x extender in between the MTF adapter and the lens?

A: In most cases the 2x extender must already be built in to the B4 Lens for it to work. This may not work if you add an extender.

Q: 6. Can I use this adapter to mount a Canon 24 to 70 mm l lens to my Black Magic URSA PL camera?

A: We are sorry to say it cannot. This is an adapter for putting EF lenses on a Sony FZ Mount camera. There is no adapter that will allow you to put an EF lens on a PL mount camera.

Q: 7. Can I use this adapter to mount a Canon 24 to 70mm L sense to my Black Magic URSA PL Camera?

A: We are sorry to say it cannot. This is an adapter for putting PL lenses on a Sony FZ Mount camera. There is no adapter that will allow you to put an EF lens on a PL mount camera.

Q: 8. Has anyone used it with an FS7 with the current firmware which includes the 2K centercrop? And what have been your findings?

A: It works on fs5 & fs7 in the centercrop mode. I'm using it with Fujinon 15x9 with the 2x engaged. In the lens 1x mode it has partial usage. Additional zoom is still available through Sony clear image zoom function. Useful range is about 20 feet plus with the 15x9.The other option is the MTF Services adapter at about $1895. It has lens correction and allows you to operate without using the center scan mode at a lower zoom ratio. Hope that helps.

Q: 9. Hi. Will this allow for mounting of Sony G-Master lenses on an F55?

A: Only legacy Sony A-mount lenses are compatible with the Fotodiox Pro Lens Mount Adapter Sony Alpha to Sony FZ Mount. If you wish to use current Sony E-mount lenses, this adapter will not work and unfortunately, due to flange distances for mirrorless lenses to sensor, there likely will not be an adapter that would.

Q: 10. Do i have to engage the doubler to fill the frame?

A: As a general rule of thumb the 2x extender must be engaged.