(B-Stock) متابع تركيز آلي من سيفينوك

For a B-stock unit, I wasn’t expecting much, but the motor engagement is surprisingly smooth and responsive. It paired easily with my rig and didn’t skip a beat during an all-day shoot. The only sign of its discount status was a tiny scratch on the housing, which doesn’t affect performance at all.

Despite the B-stock label, the motor feels tight and the gears mesh smoothly with my rig's follow focus ring. Took a few minutes to calibrate the speed curve, but once set, it holds focus through slow pulls without any hunting. The minor scuff on the housing is invisible once mounted.

For a B-stock unit, the motor engages smoothly and quietly with zero lag, which surprised me given the discount. The gear alignment took a minute to dial in, but once set, it held focus perfectly through a whole day of shooting.