Metabones ALPA to Xmount Speed Booster ULTRA 0.71x (Black Matt)

The Metabones ALPA to Fuji X-mount Speed Booster ULTRA 0.71x allows you to mount full-frame ALPA lenses on APS-C X-mount cameras, increasing the effective angle of view and boosting maximum aperture by approximately 1 stop. Its advanced 5-element/4-group optical design with ultra-high refractive index tantalum-based glass improves corner sharpness, reduces distortion, and delivers professional-level image quality.

Unlock the full potential of your ALPA lenses on Fuji X-mount APS-C cameras with the Metabones ALPA to X-mount Speed Booster ULTRA 0.71x. This innovative optical adapter condenses the lens light onto the smaller sensor, effectively reducing the crop factor from 1.5x to 1.07x, resulting in a near full-frame angle of view. In addition, the Speed Booster increases the maximum aperture by roughly one f-stop, enabling better low-light performance and a shallower depth of field for cinematic results.

The advanced 5-element/4-group optical design incorporates ultra-high refractive index tantalum-based glass, achieving superior sharpness, reduced distortion, and minimized vignetting. High-speed primes, such as a 50mm f/1.2, are transformed into ultra-fast 35.5mm f/0.9 lenses with excellent resolution from edge to edge.

Constructed with precision-machined brass and chromium plating, this adapter provides a secure, wobble-free connection between lens and camera. A matte black interior reduces internal reflections, while the satin black exterior complements most camera bodies and lenses. A detachable Arca-compatible tripod foot allows stable mounting on Arca Swiss, Markins, or Photo Clam ball heads, and two included hex keys provide easy adjustment and removal.

While the ALPA lens physically mounts on the X-mount camera, automatic functions such as AE metering or auto iris are not maintained. The adapter is designed to maintain infinity focus and preserve the optical quality of CRC and floating-element lenses.

Key Features

• Mount full-frame ALPA lenses on Fuji X-mount APS-C cameras
• Magnification: 0.71x, effectively reducing APS-C crop factor from 1.5x to 1.07x
• Increases maximum aperture by ~1 stop
• Advanced 5-element/4-group optical design with ultra-high index tantalum-based glass
• Improves corner sharpness, reduces distortion and vignetting
• Secure, zero-play connection with precision-machined brass and chromium plating
• Matte black interior to minimize internal reflections, satin black exterior finish
• Infinity focus maintained for CRC and floating-element lenses
• Detachable Arca-type tripod foot for compatibility with Arca Swiss, Markins, and Photo Clam ball heads
• Two hex keys included for tripod foot attachment and lens mounting adjustments