Cambo AC-380 User manual

AC-380 & AC-381
Fine Ratio Geared Focus
For Actus-B, -G and DB
INSTRUCTION MANUAL
EN
Please read this manual carefully before using the AC-380!
Version 1.00

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1. Preparing your Actus for installation
Before installing the AC-380 or AC-381 make sure you have the correct
knob. The AC-380 is indicated by a white dot on the barrel. The AC-380
is used for the Actus-B. The AC-381 is indicated by a red dot on the
barrel. The AC-381 is used only on the front standard of Actus-DB II and
the Actus-G.
Before installing the AC-380 slide the telescopic rail fully backwards and
lock it in position. Shift the camera plate fully to the left and lock it in
position. Make sure the geared focus is placed in zero position. With the
Actus positioned like this the accessibility of the focus knob mounting
screw is optimal.
2. Removing the Focus knob
To remove the focus knob place the supplied 2mm Allen key in the
mounting hole and unscrew the focus knob fixation bolt. When the
fixation bolt is loosened slightly rotate the focus knob back and forth
while pulling it out to remove it from the Actus.

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3. Installing the AC-380 Focus knob
Before installing the fine ratio geared knob to the focus rail make sure
you have the AC-380 which is indicated by a white dot on the barrel of
the knob. IMPORTANT! Position the AC-380 in front of the Actus rear
standard hole with the half closed housing facing upwards. (see the
figure below) To install the AC-380 push the knob in the rear standard
hole while slightly rotating it a few degrees back and forth. Push in the
knob until the barrel of the AC-380 reaches the Actus housing.
AC-380 AC-381

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4. Adjusting the AC-380 Focus knob
To fix the AC-380 in position, take the barrel of the knob and rotate it
counter clockwise while keeping pressure on the knob towards the
Actus. Use the supplied 2mm Allen key to retighten the focus knob
locking screw and tighten it firmly.
Note:
The barrel of the AC-380 is eccentric and you can adjust the feel of the
knob until it meets your demands. To adjust the knob repeat the steps
noted above and keep in mind that rotating the barrel counter clockwise
applies more pressure to the rail resulting in a stiffer knob, and rotating
the barrel clockwise will release pressure on the rail.

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5. Removing the Tilt knob
To remove the tilt knob use the supplied 2mm (for Actus-B) or 1,5mm
(for Actus-G or Actus-DB II) Allen key to loosen the tilt knob locking
screw. Remove the tilt knob by slightly rotating it back and forth while
pulling it out.

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6. Installing the AC-380 or AC-381 Tilt knob
Before installing the AC-380 or AC-381 make sure you have the correct
knob. The AC-380 is indicated by a white dot on the barrel. The AC-380
is used for the Actus-B. The AC-381 is indicated by a red dot on the
barrel. The AC-381 is used on the Actus-DB II and the Actus-G.
Installation of the AC-380 and AC-381 is similar. IMPORTANT! Place the
fine ratio geared knob in front of the front standard housing with the
half closed housing facing downwards. (See the figure below) Push the
knob in the front standard hole while slightly rotating it a few degrees
back and forth. Push in the knob until the barrel reaches the housing.
AC-380 AC-381

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7. Adjusting the AC-380 or AC-381 Tilt knob
To fix the AC-380 or AC-381 in position, take the barrel of the knob and
rotate it counter clockwise while keeping pressure in the knob towards
the front standard. Use the supplied 2mm (for AC-380) or 1,5mm (for
AC-381) Allen key to retighten the tilt knob fixation bolt.
Note:
The barrel of the AC-380 and AC-381 is eccentric and you can adjust the
feel of the knob until it meets your demands. To adjust the knob repeat
the steps noted above and keep in mind that rotating the barrel counter
clockwise applies more pressure to the rail resulting in a stiffer knob,
and rotating the barrel clockwise will release pressure on the rail.

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Cambo Fotografische Industrie B.V.
Cambo R&D June 2019
This instruction manual is prepared with care, although no responsibility, financial or otherwise, is accepted for
any consequences related the information stated in this instruction manual. All specifications in this instruction
manual are subject to change without notice.
For more information please visit the Cambo web site: www.cambo.com