The OConnor O-Focus Dual Mini Photo Set is a follow focus system equipped with a Hard Stop Handwheel and designed double-sided to optionally also accommodate a Cine Handwheel.
The Dual Mini attaches to a lens by sliding dovetail and is adjustable thus to various lens diameters. Its main bridge is very low-profile and has a gear drive ratio of 1:0.75, which produces 270° of rotation for every 360° that the handwheel is turned, and which hence affords longer, more exacting pull on limited rotation still lenses.
The Hard Stop wheel features a transmission ratio of 1:1 and so maintains the gear driver's longer pull. The wheel offers also the benefit of setting minimum and maximum focus points for infinite rotation lenses, and of performing hard stop pulls, and, moreover, of an on/off switch it has that at the employ of a hand instantly disengages end stops so that important adjustments can be made during sudden moments in a scene.
The Dual Mini is made of lightweight, durable black anodized aluminum. Its bridge can be used with an included LWS rod bridge or optionally with 15/19mm studio rod systems. It can also be used with interchangeable gears and with a handwheel extension. Its low-profile design with no swing arm and with a direct-drive gear box is ideal for large barrel diameter lenses.