The used Metabones Nikon G to Blackmagic Cinema Micro 4/3 Speed Booster allows you to mount any Nikon F-mount lens to the Blackmagic Cinema Camera Micro 4/3 Mount. Key features include:

Nikon G Compatibility. This adapter was designed specifically for the Blackmagic Cinema Camera Micro 4/3 Mount. It allows you to use both G and non-G series Nikon F-mount lenses, including legacy non-AI and AI lens mounts, on the BMCC. Due to the smaller sensor size, you can also use DX (crop-frame) lenses. This adapter is not for use with any Micro 4/3 camera or camcorder other than the BMCC Micro 4/3 or BMPCC.

Wider Focal Length and Increased Aperture. This BMCC version of the Speed Booster widens the mounted lens’s focal length by 0.64x, effectively reducing the overall sensor crop factor from 2.39x to 1.53×. Additionally, the adapter increases the maximum aperture of the mounted lens by 1 1/3 stops, with a maximum output aperture of f/0.8.

Aperture Ring. The adapter has its own eight-stop aperture ring for controlling Nikon G-series lenses without their own aperture rings. The ring also has half-stop clicks, allowing you to set it to a specific aperture.

Sturdy Design with Built-In Tripod Foot. The aluminum barrel and brass mounts give it a solid feel, with an Arca-Swiss compatible tripod foot that lets you mount the adapter itself directly to a tripod. This ensures the lens’s weight doesn’t put additional stress on the camera’s mount.

What This Adapter Doesn’t Do. This adapter provides no electronic communication with the camera, so you won’t have autofocus, and EXIF data will not be transferred. You can’t set the camera to auto and start shooting; you must make some manual exposure adjustments first.