Metabones Nikon G to Emount Speed Booster ULTRA 0.71x (Black Matt) (Open Box)

Speed Booster ULTRA
Sharper corners, less distortion, reduced vignetting

New optical design:  advanced 5-element/4-group optical design incorporating ultra-high index tanatalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.

Key Features:

• Industry's best aperture ring covers a 8-stop range markings, clearly indicating actual number of f-stops. No more guesswork! (Patent pending).
• Compatible with both Nikkor G lens &  F lens (include non-AI & AI lens mounts).
• Advanced 5-element/4-group optical design incorporating ultra-high index tanatalum-based optical glass by Caldwell Photographic in the USA (patent pending).
• Increase maximum aperture by 1 stop.
• Increase MTF.
• Makes lens 0.71x wider.
• The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.
• Both camera-side and lens-side of the adapter are made of brass, precision-machined and plated with chromium.
• Satin surface finish - just like your OEM lens and camera mounts.
• Precise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens.
• Designed to reach infinity focus while maintaining the correct registration distance required to maintain optical quality of CRC lenses or lenses with floating elements.
• True electronic integration of aperture diaphragm - let camera automatically choose aperture in P or S exposure modes, or dial in yourself on the camera body in A or M modes.
• EXIF data such as lens identification, focal length and aperture.

Lens Compatibility:

• Nikkor F-mount lens
• include Nikkor G series, AF-D, AI-P, AIS, AI and non-AI lens only.

Unsupported List:

• Nikkor DX lenses and third-party lenses designed for APS-C format DO NOT WORK AT ALL when used in conjunction with Speed Booster® due to the limitation of image coverage.
• Nikkor 2.1cm f/4
• Nikkor AI-S 20mm f/2.8
• Nikkor E series lens, the diaphragm blades are not operated by mechanical linkage levers, such as Nikkor 105mm f/1.4E, Nikkor AF-S 70-200mm f/2.8E FL ED VR, Nikkor AF-S 16-80mm f/2.8-4E ED DX VR, and Nikkor AF-S 24-70mm f/2.8E ED VR, Nikkor AF-S 600mm f/4E FL ED VR and PC-E 19mm, 24mm, 45mm, 85mm T/S Lens, etc.
• This adapter is manual aperture control. It does NOT support electronic aperture control, AF and image stabilization.