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Black metal lens mount adapter kit with shims and caps

Carl Zeiss

Carl Zeiss Interchangeable Mount Set CP.3 21mm T2.9 25/28/35mm T2.1 Canon EF

SKU CH-AS49-1NZ5N

Adapts Zeiss CP.3 21mm T2.9 and 25/28/35mm T2.1 lenses to Canon EF mount with shims and support bracket included

  • Adapt CP.3 21mm T2.9 and 25/28/35mm T2.1 lenses to Canon EF cameras
  • Colored plastic shims enable precise lens alignment for optimal image quality
  • Rugged EF adapter ring and support bracket deliver stable performance in demanding use
  • Included EF-mount cover ring and rear lens cap protect lenses from dust and damage
  • Mount set works with PL, MFT, F, E or EF lens mounts for broad flexibility

Canon EF Mount Conversion for CP.3 Primes

This interchangeable mount set converts Zeiss CP.3 prime lenses to Canon EF mount. It supports the 21mm T2.9 and the 25mm, 28mm, and 35mm T2.1 focal lengths. The kit includes an adapter ring, support bracket, coloured shims for flange alignment, a cover ring, and a rear lens cap. It is built for cinema professionals who need to adapt their existing CP.3 glass to EF-mount camera bodies.

Suited for CP.3 owners moving to EF bodies

Cinematographers and owner-operators with CP.3 primes who are switching to or adding Canon EF mount cameras will use this set. The shims allow precise back-focus adjustment for critical focus accuracy. The support bracket adds stability for heavier cinema accessories. It is not for users who need PL, E, F, or MFT mounts instead of EF. It is also not for owners of other lens series such as CP.2, Supreme Primes, or Loxia, as the mechanical interface differs.

Flange-distance alignment via coloured shims

The included plastic shims are the critical component for achieving correct flange focal distance on the EF mount. Without precise shimming, infinity focus and focus markings will be inaccurate. The installer must measure and select the correct shim thickness during assembly. This step requires a lens collimator or professional bench tools; it is not a simple screw-on adapter for casual use.

Highlights

  • Adapt CP.3 21mm T2.9 and 25/28/35mm T2.1 lenses to Canon EF cameras
  • Colored plastic shims enable precise lens alignment for optimal image quality
  • Rugged EF adapter ring and support bracket deliver stable performance in demanding use
  • Included EF-mount cover ring and rear lens cap protect lenses from dust and damage
  • Mount set works with PL, MFT, F, E or EF lens mounts for broad flexibility

Specifications

No published specifications for this item yet.

Questions about this item

Which lens focal lengths and T-stops does this Canon EF mount set support?

The set is built for the CP.3 21mm T2.9 and the 25mm, 28mm and 35mm T2.1 lenses, matching their exact flange depth and aperture indexing.

What physical parts are included to secure the mount on a Canon EF camera?

A rugged EF-adapter ring, a support bracket, coloured plastic shims for precise alignment, an EF-mount cover ring and a rear lens cap EF for protection.

How is the mount swapped on the CP.3 lens, and which step is most often missed?

Remove the existing mount, fit the new EF ring with the bracket, then insert the coloured shims until the flange distance is exact — skipping the shim adjustment is the common error.

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