MTF Services Ltd B4 2/3" to Canon EF Adapter

MTF Services Ltd B4 2/3" to Canon EF Adapter

MTF Services Ltd B4 2/3" to Canon EF Adapter

MTF Services Ltd B4 2/3" to Canon EF Adapter Back View

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Expected availability: Apr 30, 2019

Product Highlights

  • Adapts B4 lenses to Canon EF
  • Multi Layer Coated Optics
  • Solid Aluminum Construction
  • Chrome Plated Canon EF Mount
  • Includes Support Bridge
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Used Open Box for $1,199.95

MTF Services Ltd MTB4CANEF Overview

  • 1Description

The B4 2/3" to Canon EF Adapter from MTF Services Ltd enables the use of ENG style B4 2/3" lenses on cameras with the Canon EF mount. The adapter features multi layer coated optics, solid aluminum construction and a chrome plated EF mount. A lens support bridge for use with industry standard 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. Engaging the 2x extender also allows the adapter to optically correct for using your lens on a single sensor.

Adapts B4 2/3" lenses to Canon EF mount cameras
Multi layer coated optics and solid aluminum construction
Includes support bridge for use with 15mm rod support systems
UPC: 635346640773
In the Box
MTF Services Ltd B4 2/3" to Canon EF Adapter
  • Lens Support Bridge
  • 1-Year Limited Warranty
  • Table of Contents
    • 1Description

    MTF Services Ltd MTB4CANEF Specs

    Camera Mount Canon EF
    Lens Mount B4 Mount
    Packaging Info
    Package Weight 0.8 lb
    Box Dimensions (LxWxH) 7.4 x 4.4 x 3.0"

    MTF Services Ltd MTB4CANEF Reviews

    B4 2/3" to Canon EF Adapter is rated 4.0 out of 5 by 1.
    Rated 4 out of 5 by from ??????? EOS C300??????????????????×2??????????????????? ???????f?2stop????? ???????????2/3??????????????????????????????35???????????????????????????????????????????????????? ???HJ14?4K???CJ???????????????????? ????????????????f?????????????????????EF???????????????????????????????????????? ??????4K??????????????????????????????????????????????????????????
    Date published: 2018-11-06
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    does this adapter correct chromatic aberration from B4 lens ? since B4 lens is design for 3CCD chip
    Asked by: John P.
    The MTF Services Ltd B4 2/3 to Canon EF Adapter will optically correct for the different spectral alignments between three chip prism block sensors and single sensors as long as the 2X extender is engaged.
    Answered by: Dennis A L.
    Date published: 2018-08-28


    What is the multiplication factor of the adapter by itself? I've heard that it's 1.35X, can anyone confirm this?
    Asked by: Anonymous
    Cheaper to buy the Kenko 1.4x Pro Teleconverter which will do the same job!
    Answered by: Lee M.
    Date published: 2018-08-28

    i can't gather from your questions and answers so ...

    i can't gather from your questions and answers so far: do i need to buy an additional 2x (ef-ef) teleconverter in order to use old SD b4 lenses without too much vignetting? i am confused because the product shown on the pictures already has an adapter with a lense which i assumed was the converter? tldr: my lens doesn't have a 2x extending-mode. and i want to shoot on a fullframe camera like 5d mII. what else do i need?
    Asked by: antonia
    I am sorry, but the lens most have a 2x extender already built in to it along with being for 2/3". Also the sensor on the camera being used cannot be larger than Super 35mm or APS-C.
    Answered by: Joseph
    Date published: 2019-03-29


    In the video you state that you can use the adaptor in 1x and 2x range however on B&H you state that you must have the 2x engaged to avoid vignetting - which is correct or have I misunderstood something?
    Asked by: Craig H.
    Craig, I have this adapter (no longer use it though) and although you have the ability to toggle between 1x and 2x, 1x has serious vignetting and therefor you must only shoot in 2x.
    Answered by: Anonymous
    Date published: 2018-10-24


    I have an HJ9x5.5 wide lens. How will this adapt to the super 35mm sensor if i decide to get an b4 to EF adapter?
    Asked by: Anonymous
    I'm not too knowledgeable about that specific lens. In general the adapter requires the 2x extender on the lens to be engaged, enlarging the image circle at the rear element so that it will cover the S35 sensor. Does that lens have a built in 2x?
    Answered by: Gregory K.
    Date published: 2018-08-28
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    MTF Services Ltd MTB4CANEF Q&A

    MTF Services Ltd MTB4CANEF Accessories

    Designed For Use With:

    • ARRI ALEXA Mini
    • Blackmagic Design Cinema Camera
    • Blackmagic Design Production 4K
    • Blackmagic Design URSA 4.6K
    • Blackmagic Design URSA 4K
    • Blackmagic Design URSA Mini 4.6K
    • Blackmagic Design URSA Mini 4K
    • Blackmagic Design URSA Mini Pro 4.6K
    • Blackmagic Design URSA Mini Pro 4.6K G2
    • Canon EOS 1D C
    • Canon EOS C100
    • Canon EOS C100 Mark II
    • Canon EOS C200
    • Canon EOS C200B
    • Canon EOS C300
    • Canon EOS C300 Mark II
    • Canon EOS C500
    • Canon EOS C700
    • Canon EOS C700 FF
    • Panasonic AU-EVA1
    • Panasonic VariCam LT
    See any errors on this page? Let us know.