B4-Canon EOS EMF AF Confirm Adapter

Save $29.11
PixcoSKU: 020238

Sale price$109.51 Regular price$138.62

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Featuring electronic chip and communication, this adapter enables support focus prompt.
Through the use of an optical glass correction lens, this adapter is designed to maintain infinity focus.
The all-metal adapter is designed to fit the lens securely, yet can still be removed easily when not needed.

Although the lens will fit physically, automatic diaphragm (AE metering), or other auto functions are not retained using this adapter.
Both camera-side and lens-side of the adapter are made of metal, precision-machined and plated with chromium
Precise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens.
Designed to reach infinity focus while maintaining the correct registration distance required to support CRC lenses or lenses with floating elements.
Satin surface finish


Allows adjust aperture & focal length, EXIF is 1mm-65535mm, f1.1-f64.

Programming setting:

  1. Set the maximum aperture on the lens.
  2. Set the desired aperture on the camera.
  3. Focus and meter the object, when the focus is achieved.
  4. Set the lens aperture to the same desired aperture as the camera setting.
  5. Press the shutter button and take the picture.


The ring has THREE setting modes:

Mode 0- enter the lens’ maximum aperture.

Mode 1- enter the lens’ focal length.

Mode 2- enter lens’ focus micro adjustment.

Turn the aperture dial to a specific aperture value and press the shutter button to enter the desired setting mode.



Although it can be attached physically, automatic diaphragm, auto-focusing, and other functions do not operate correctly while using this adapter. You need to use the stop-down mode when metering since the lens does not have the ability to have its aperture controlled by the camera body. The added microchip (or dandelion chip) enables the focusing confirmation function with EOS Digital bodies, which helps you to focus even in the dark. You can shoot in manual or aperture priority mode.

Compatible with:
B4 2/3" ENG Cine Lens
All Canon EOS Mount Camera
(such as:850D/250D/90D/4000D/2000D/6D II/200D/77D/5D IV/1300D/80D/5DS/5DS R/760D/750D/7D II/6D/7D/5DIII/5DII/100D/700D/650D/600D/550D/1100D/1000D/500D/70D/60D/50D/40D..etc)

Do Not work with 30, 30V & 33V and 1D series.

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