Metabones Nikon G to BMCC Speed Booster

Nikon-G/F to Micro-4/3 mount Speed Booster adapter is designed exclusively for the Blackmagic Cinema Camera (BMCC) with an MFT mount. The 0.64x Speed Booster reduces the full-frame crop factor of the BMCC from 2.39x to 1.53x, thus effectively transforming it into a Super-35 format cine camera! In addition, the speed of any attached lens is increased by 1-1/3 stops, with a maximum output aperture of f/0.80. For example, a 50mm f/1.2 becomes a 32mm f/0.80, and Sigma's 18-35mm f/1.8 will become an 11.5-22.5mm f/1.1.

Advanced Optical Design
The Speed Booster uses an advanced 6-element optical design incorporating ultra-high index glass to achieve extraordinary optical performance at record-breaking apertures. In addition to increasing lens speed and field of view, the new Speed Booster significantly increases the lenses MTF (Modulation Transfer Function). There is a dramatic performance enhancement near the center of the image, but there is also a moderate performance improvement in the outer parts of the image as well.

Compatible with Nikon FX and DX Lenses
It can be used with FX and DX lenses, including DX lenses with fixed lens hoods (e. g. Nikon 10.5mm/2.8 Fisheye or Sigma 8-16mm/4.5-5.6 Ultra-wide Zoom). Using the 0.64x Speed Booster on BMCC, the original FOV of DX lenses is fully restored; a 180° fisheye remains a 180° fisheye!

Specifications
Magnification:  0.64x
Crop Factor with BMCC:  1.53x
Maximum Output Aperture: f/0.80 (with f/1.2 lens attached)
Rectilinear Distortion: < 0.35%
Lens Elements/Groups: 6/4
Length Reduction: 5.7 mm
Camera Mount: Blackmagic Cinema Camera MFT
Lens Mounts: Nikon F
Lens Compatibility: Both FX and DX format lenses can be used
Special Features: Improved long-throw clickless Nikon G aperture ring
Dimensions: 174 mm x 66 mm x 33 mm
Weight:  177 grams
Tripod Mount: Robust removable type with Arca Swiss compatibility

Known Incompatible Lenses:
Nikkor 20mm f/2.8 AI-S
Nikkor 2.1cm f/4