Before beginning, verify that you camera is a model that is known to work with the controller:

1D Mark Ⅳ/ 5D Mark Ⅱ/ 5D Mark Ⅲ/7D/ 60D

600D/ Rebe T3i/ Kiss×5

550D/ Rebe T2i/ Kiss×4

500D/ Rebe T1i/ Kiss×3

An autofocus lens must be intalled on the camera if you intend to use the controller’s focus features. Manual focus lenses will also work, but you lose the ability to control focus or use the focus point functions.Canon USM or equivalent autofocus lenses are recommended---they tend to be quieter and more consistent.

1, With the camera off, connect the controller using a USB mini-B to A cable. Turn on the USB Focus Controller by sliding the power switch to the “on” position, away from the focus knob. The LED indicator will display the current battery level with a flickering red, yellow, or green light, followed by the controller status:

Yellow Camera disconnected or turned off

Green   Camera connected, focus point mode

Blue    Camera connected, settings mode

Purple   Camera connected, focus zone mode

Red     Camera recording

2, Turn on the camera. The LED should change from yellow to green, indicating that the USB connection has been established and the USB Focus Controller is now in the focus point mode.

3 ,If the live view display on the camera is turned on, you can adjust focus by turning the knob.

There has several characteristics that directly affect the performance of the USB Focus Controller:

1 ,When a focus command is sent to the camera, a success packet is always returned, even if the command is ignored. The controller can repeatedly send focus commands, but if the camera is performing another action, the focus will not change.

2 ,There is no way to detect an ignored focus command other than seeing that the focus did not move on the lens or in the live view image. No USB feedback is given when focus commands are ignored.

3, If the rate of commands is too fast, it can cause the camera to temporarily pause and ignore further commands. The maximum reliable rate is about 15 commands per second if the lens in use is mechanically able to move between focus position at this speed.

4, The time it takes for each lens model to change focus from one position to another varies, depending on the type of lens motor, the focal length, and the focus step size.

These characteristics make it necessary to adjust the focus command send rate to match the focal length of your lens and the focus step size.

USB Focus Controller Functions:

Note: Press the left key of 5 and 8 to switch between different states.

The function of each witch is divided into short presses (less than 1/2 second), and long presses (hold more than 1/2 second)

1 Short---cycles small/medium/large focus step size

 Hold---turns live view on and off

2 Constant smooth focus towards infinity

3 Constant smooth focus towards minimum focus distance

4 Short---cycles 1×/5×/10× zoom

 Hold---initiates autofocus or metering

USE Short---starts and stops video recording

 Hold---initiates image capture

5 Multi---funtion switch

 ●G Focus point mode:

      Short---goes to near focus stop

      Hold---saves or clears current focus stop location

 ●B Settings mode: Exposure compensation

 ●P Focus zone mode: Moves focus zone downwards

6 Multi-function switch

 ●G Focus point mode

     Short---goes to focus point

     Hold---saves or clears current focus point location

 ●B Settings mode: Shutter speed

 ●P Focus zone mode: Moves focus zone left

7 Multi-function switch

 ●G Focus point mode:

     Short---goes to focus point

     Hold---saves or clears current focus point location

 ●B Settings mode: Aperture

 ●P Focus zone mode: Moves focus zone right

8 Multi-function switch

 ●G Focus point mode:

     Short-goes to infinity focus stop

     Hold-saves or clears current focus stop location

 ●B Settings mode: ISO

 ●P Focus zone mode: Moves focus zone up

Note: Press the left key of 5 and 8 to switch between different states.