Meike has made an 8mm T2.9 available for pre-order that covers APS-C sensors, including the Blackmagic Pocket Cinema Camera and Panasonic LUMIX G-series cameras, but the caveat is it's only available in Micro Four Thirds mount. 

The lens features cine-friendly housing, complete with standard 0.8 mod gears for both iris and focus, a common 86mm filter thread, and a generous 270° focus throw.

Speaking of focus, it is a manual lens, so bear that in mind.

Optically, it's constructed from 12 elements in seven groups and features a 10-blade aperture design.

As you might expect with a focal length of this size, it features a wide field of view: diagonal 108.6°, horizontal 96°, and vertical 80°. The minimum focusing distance is a mere 25mm (< 1"), and Meike suggests the lens has low distortion, which is ideal with wider focal lengths. 

Built from an all-metal design, the lens is still light and weighs only 549 grams. The lens joins seven other MFT focal lengths that range from 12mm to 85mm. If you're familiar with Meike glass, you can expect similar focus breathing, great contrast, little color cast, and a smooth bokeh.

The 8mm T2.9 is priced at $439 and is expected to ship in November.