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Professional lenses and cameras may have two mounting holes, for which you can use both the
Small Mounting Bolt (18) and Large Mounting Bolt (17) simultaneously. If you prefer to remove
one of the mounting bolts, remove the Rubber Cover (19) from the bottom of the QR plate, slide
out the bolt, and replace the Rubber Cover (19). When mounting any camera, camcorder, or lens,
slide the bolt(s) within the slot in the QR plate to achieve the best positioning of the plate. Always
mount the plate parallel to the direction of your lens for proper operation of this gimbal.
The Anti-twist Pin (16) is designed for an anti-twist hole found in the bottom of some camcorders
and lens mounting rings. If your camera or lens does not have this hole you can remove the pin by
unscrewing it from the bottom of the QR Plate with a flathead screwdriver. Or, since the pin is
spring loaded, you can leave it in place and it will retract on its own when it makes contact with
the bottom, flat surface of your camera or lens.
Before mounting your rig to the GH30C, tighten the Arm Tension Control Knob (1) and the Base
Lock knob (13). With the QR Plate (15) firmly attached to your equipment, open the jaws of the
Quick Release Receiver (6) by turning the Quick Release Knob (8) counterclockwise. Place the QR
Plate (15) into the receiver. Continue to hold your rig as you now firmly tighten the Quick Release
Knob (8). Once you are sure the QR Plate (15) is firmly connected to the GH30C you can slowly let
go of it. Take note of the two Safety Bolts (20) in the QR Plate (15) which prevent the plate from
accidentally sliding out of the gimbal. These bolts can be removed but be cautious in doing this as
your equipment can slide out of the gimbal and fall more easily.
Operating the GH30C
Begin by balancing your rig. With the Base Lock Knob (13) tightened, slowly/slightly loosen the
Arm Tension Control Knob (1). If the Arm (2) of the GH30C begins to move, the rig is out of
balance. Tighten the Arm Tension Control Knob (1). With a firm hold on your rig slightly loosen
the Quick Release Knob (8). Once this knob is loosened enough to slide the rig and its QR Plate
(15) within the Quick Release Receiver (6), slide it forward or backward a little bit to counteract
the movement of the Arm (2). Tighten the Quick Release Knob (8) repeat these steps again until a
balance point is achieved.
Now you will adjust the gimbal so your rig pivots properly, rather than swings. Loosen the
Platform Knob (4) and slide your rig upward along with the Platform (5) along the Arm (2) until
the center of you lens is aligned vertically with the white triangle-shaped marker at the top of the
Vertical Adjustment Scale (3). The "center of your lens" refers to the vertical center of its barrel.
You can also use the vertical center of the lens-to-camera mount as a visual guide for this. Once
you have found this proper 'pivot point' for the lens, tighten the Platform Knob (4) and one again
loosen the Arm Tension Control Knob (1) slowly. Your camera should remain in place, level on the
GH30C. If it does not, repeat the balancing process as described in the above paragraph.
Once you have found the ideal placement of a particular camera/lens combination use the
markings on the Vertical Adjustment Scale (3) and the Receiver Adjustment Scale (7) to make a
note of their positions. When you want to attach this exact rig to the GH30C in the future you can
pre-set it to these positions using the scales before mounting the rig to the gimbal. This is both
faster and easier to accomplish without the weight of the rig on the gimbal.
With your camera and lens attached and balanced you can now enjoy using the GH30C. For fast
action type movements loosen the Base Lock Knob (13), the Arm Tension Control Knob (1), and
the Pan Base Tension Control Knob (11). A properly balanced rig will provide fast movements for
quick tracking of moving objects with these controls loosened. This is how most, traditional
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