The resistance (feel/friction) of the Focus Knob can be adjusted by the user but care must be taken. The screws are tightened against a specific point on the flat of a D shaped internal shaft. Loosen them too much and the knob will slip around the side of the shaft.
You will need a 1.5mm hex/allen key to adjust the two screws (A Wera 118066 is the tool we suggest)
-Firstly, loosen each of the two M3 x 8mm flat grub screws a little by rotating it anti clockwise.
-Secondly, re-set the friction amount by very gently pulling the Focus Knob away from the Controller
-Then, whilst applying a little pressure (keep the pressure constant until tightening has ceased) to the face of the Knob, re-tighten each screw to equal amounts
-Test the Large Knob for resistance
-Re-adjust until required resistance is found by pulling (less) or pushing (more) on the Knob before re-tightening
After performing this, You may need to recalibrate the Focus Knob on the Controller by going to MENU / INPUTS / RECAL KNOB and lightly touch the focus knob to both end stops.