Metabones Nikon G to Emount Speed Booster ULTRA 0.71x (Black Matt)
by MetabonesNikon F-Mount Lens to Sony E-Mount Camera, Ultra-High Index Tantalum-Based Glass, Increases Maximum Aperture by 1 f/Stop, Increases Angle of View by 0.71x, Built-In Long-Throw Clickless Aperture Ring, Compatible with Nikon G Lenses, Infinity Focus Adjustment, Detachable Tripod Foot, Black Matte Interior; Black Exterior
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The Nikon F-Mount Lens to Sony E-Mount Camera Speed Booster ULTRA from Metabones improves upon the original Metabones Speed Booster with a 5 element/4 group optical design that incorporates ultra-high refractive index tantalum-based glass for improved sharpness and reduced distortion and vignetting. The Speed Booster ULTRA allows a full frame Nikon F-Mount lens to be mounted to an APS-C format E-Mount camera and in doing so, increases the angle of view and increases the maximum aperture by approximately one f/stop. It is compatible with NIKKOR F mount and F Mount G lenses including AI and non-AI mounts.
| Lens Mount | Nikon F-Mount |
| Magnification | 0.71x |
| Crop Factor | With APS-C format camera: 1.07x |
| Maximum Aperture | f/0.90 (with f/1.2 lens attached) |
| Rectilinear Distortion | < 1% |
| Optical Construction | 5 Elements/4 Groups |
| Length Reduction | 0.17" (4.2 mm) |
| Tripod Mount | Removable with Arca Swiss compatibility |
| Weight | 6.8 oz (193 g) |