Metabones Contax N to Emount Speed Booster ULTRA 0.71x (Black Matt)

The Metabones Nikon G to BMCC Speed Booster 0.64x (Black Matt) adapts Nikon G and F-mount lenses to the Blackmagic 2.5K Cinema Camera, reducing the effective crop factor from 2.39x to 1.53x and increasing lens speed by 1⅓ stops for ultra-fast f/0.8 performance. Designed for manual aperture control, this high-quality adapter provides improved optical performance, precise fit, and a durable build with a detachable tripod foot.

Transform your Nikon G and F-mount lenses into super-speed cinema lenses with the Metabones Nikon G to BMCC Speed Booster 0.64x (Black Matt). Designed exclusively for the Blackmagic 2.5K Cinema Camera with a Micro Four Thirds mount, this adapter reduces the camera’s crop factor from 2.39x to 1.53x, effectively creating a Super 35mm field of view. Lenses become faster by 1⅓ stops, with a maximum output aperture of f/0.80 — for example, a 50mm f/1.2 lens becomes a 32mm f/0.8.

Crafted from aluminum alloy and brass with chromium plating, the adapter features a click-less manual G aperture ring and a felt-flocked interior to reduce internal reflections. A detachable Arca-type tripod foot ensures compatibility with popular ball head systems such as Arca-Swiss, Markins, and Photo Clam. The adapter is manually operated and does not support electronic aperture control, maintaining precise infinity focus and optimal optical quality for CRC lenses or lenses with floating elements.

Please note: Certain lenses, including Nikkor 2.1cm f/4, Nikkor AI-S 20mm f/2.8, and Nikon E-series lenses with electronic diaphragms, are not compatible.

Key Features

• 0.64x focal reduction for Blackmagic 2.5K Cinema Camera (Micro Four Thirds mount)
• Increases maximum aperture by 1⅓ stops (up to f/0.80)
• Compatible with Nikon G and F-mount lenses, including non-AI & AI
• Click-less manual G aperture ring with 8-stop markings
• Improves MTF and optical performance
• Makes lenses 0.64x wider for Super 35mm field of view
• Felt-flocked interior reduces internal reflections
• Durable aluminum alloy and brass construction with chromium plating
• Detachable Arca-style tripod foot