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Camera Systems > Cambo > Cambo Actus Series Accessories > Actus Accessories and Conversion Kits >
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Fine Ratio Gear for Actus Focus AC-380 | Cambo
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The Cambo AC-380 and AC-381 are replacement fine geared focus assemblies for the Actus camera bodies, with the unique ability to drive the focus movement in normal ratio as well as with a fine ratio of 1:5, allowing very precise focusing in all situations. The extra focus layer knob has a larger diameter for optimal fine focus.
The AC-380 fine ration gear can be added to every Actus-B, Actus-G and all Actus-DB versions
The AC-381 fine ratio tilt gear is only for the Actus G and DB
Product Code:
Fine Ratio Gear for Actus Focus AC-380 | Cambo

Further Information:

 Consists of an assembly of the drive gear, direct drive knob and a fine ratio knob.

 It can also be used in the same way for replacement of the Tilt knob assembly on the front standard of the Actus-B and early Actus-DB, adding a fine ratio tilt functionality.


  • Additional weight: 26 gram after exchange
  • Additional width:  10 mm after exchange
  • Direct drive knob diameter: 32 mm
  • Fine ratio gear knob diameter: 25 mm
  • Package includes drive assembly AC-380 or AC-381, 1 hex key, 1 instruction manual.

Compatibility on REAR standard:

Actus-B (including B2, B4, B6, B8)

Actus-DB and Actus-DB2

Actus-G (including Actus-GFX, XCD)


Compatibility on FRONT standard:

Actus-B (including B2, B4, B6, B8)

Actus-DB early versions

AC-381 is required for Actus-G and Actus-DB2