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MTF Services Ltd B4 2/3" to Sony E-Mount Lens Adapter Package

BH #MTB4SEM • MFR #MTB4SEM
4 reviews
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MTF Services Ltd B4 2/3" to Sony E-Mount Lens Adapter Package
Key Features
  • Adapts B4 lenses to Sony E and Canon EF
  • Multi Layer Coated Optics
  • Solid Aluminum Construction
  • Includes Support Bridge
The B4 2/3" to Sony E-Mount Lens Adapter Package from MTF Services Ltd includes two lens adapters, a B4 2/3" to Canon EF adapter and a Canon EF to Sony E adapter. The kit enables the use of ENG style B4 2/3" lenses on cameras with either Sony E-mount or Canon EF mount, like the Sony NEX-FS100 or the Canon C-300. The B4/EF adapter feature multi layer coated optics, and both adapters are of solid aluminum construction. A lens support bridge for use with 15mm rod support systems is also included.
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MTF Services Ltd MTB4SEM Overview

The B4 2/3" to Sony E-Mount Lens Adapter Package from MTF Services Ltd includes two lens adapters, a B4 2/3" to Canon EF adapter and a Canon EF to Sony E adapter. The kit enables the use of ENG style B4 2/3" lenses on cameras with either Sony E-mount or Canon EF mount, like the Sony NEX-FS100 or the Canon C-300. The B4/EF adapter feature multi layer coated optics, and both adapters are of solid aluminum construction. A lens support bridge for use with 15mm rod support systems is also included.

Note:
In order to avoid vignetting, the B4 2/3" lens will need to have the 2x extender engaged and the camera's image sensor should be Super 35mm or smaller. HD lenses are recommended.
Adapts B4 2/3" lenses to Sony E and Canon EF mount cameras
Multi layer coated optics and solid aluminum construction
Includes support bridge for use with 15mm rod support systems
UPC: 635346640780

MTF Services Ltd MTB4SEM Specs

Mount Type
B4 2/3" (female) to Canon EF (male)
Canon EF (female) to Sony E (male)
Packaging Info
Package Weight
1.45 lb
Box Dimensions (LxWxH)
7.8 x 5.1 x 4.8"

MTF Services Ltd MTB4SEM Reviews

B4 2/3 to Sony E-Mount Lens Adapter Package

By jefftv
Rated 4 out of 5
Date: 2017-05-27

Works well and is a flexible mount system that also incorporates a solution for EF mount lenses

Just extended the lifespan of my lenses

By 2e
Rated 5 out of 5
Date: 2014-10-20

This product has breathed new life into my expensive HD broadcast lenses. I can go back to shooting documentaries as I grew up doing with a REAL zoom lens that tracks and and aperture ring on the lens!

See any errors on this page?

Can I uses this adapter on FX 6 full frame sensor ...

Can I uses this adapter on FX 6 full frame sensor with out using x2 on the B4 lens?
Asked by: DANIEL
With adapters you are going to want to work with B4 lenses that have a 2x extender. The MTF Services Ltd B4 2/3" to Sony E-Mount Lens Adapter Package can only be used on B4 2/3" lenses with built in 2X extender engaged. Also, HD B4 lenses are recommended.
Answered by: Chris H
Date published: 2024-03-28

Hi! What cable do I need to power the servo motor ...

Hi! What cable do I need to power the servo motor zoom an a lens with a v-lock battery? Could someone link please?
Asked by: Sebastian
Most B4 lenses work with 12pin power connections and you could work with this cable. FotodioX 12-Pin Hirose to D-Tap Power Cable for ENG Lens Servo Functions https://bhpho.to/2Ixd7qs
Answered by: Chris H
Date published: 2022-07-29

What is the light loss through the adapter?

What is the light loss through the adapter?
Asked by: Matthew
With The MTF Services Ltd B4 2/3" to Sony E-Mount Lens Adapter Package, this item BH #MTB4SEM has the 2x Extender. That is 2 stops of light loss.
Answered by: Craig
Date published: 2020-03-24

question

will this work on my sony Fs7 camera?
Asked by: Geordin
When you stack the adapters in this package, it allows the use of B4 lenses on E-mount camera's such as the FS7. The added advantage is that you can also put the B4 lenses on Canon EF mount cameras as well.
Answered by: Dennis A L.
Date published: 2018-08-28

How can I get just the black support bracket that ...

How can I get just the black support bracket that is included in this package? This is a specific bracket made to fit these MTF adapters.
Asked by: Tim
It would be best to contact MTF Services directly. Here is there contact page: https://www.mtfservices.com/content/contact
Answered by: Nick Y
Date published: 2022-08-09

question

is this adaptor crop the image from a 2/3 fujinon 4.8 lens?
Asked by: Anonymous
Sorry, but we are not understanding what you are asking regarding a 4.8 lens. We can say that if you have a Fujinon 2/3 HD lens that has a 2x extender built in, you can now use it on a Canon or a Sony camera with a Super35 sensor. (It will not work on a full frame sensor for it will vignette.) Regarding field of view, I suggest forgetting crop factor and learn what is wide, normal and tele is for the format you are using rather than calculating the crop factor of a format you are not using. For example, in Super35, 18mm is very wide, 32mm normal and 60mm tele. If you use a typical Fujinon 8.0-128mm Quick Zoom ENG HD lens and engage the 2x extender, it now is a 16mm to 256mm lens. This will give you the focal lengths for what you need to do and much more.
Answered by: Dennis A L.
Date published: 2019-02-27

question

is there a support bridge for 19mm rail instead of the 15mm rail ?
Asked by: John
MTF does not offer this with a 19mm support bridge. You can use any of the many others available. Here is the most affordable and the next up in price and quality.
Answered by: Dennis A L.
Date published: 2018-08-28

question

Do you have to use the doubler if your using the 2k center cut on a Sony F5 or F55?
Asked by: Brad
I have successfully used the adapter without needing a doubler in 2K Center on my FS7. I imagine the F55 is similar. The firmware update made the 2x extender unnecessary and preserve maximum light intake.
Answered by: Mont T.
Date published: 2018-08-28
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