Gitzo G1378M ball head test, tilting ball up 60 degrees and looking for creep. Head mounted on Manfrotto 3021Pro. Camera is Olympus E-300 with Battery Holder and 40-150mm EZ Zoom Zukio lens.

Head measures approximately 50mm diameter and weighs 2.4 lbs. Firm lock is achieved with 1/2 turn of locking knob.