Update to Original Speed Booster. The Ultra line of Speed Boosters features an improved four-group/five-element optical design with ultra-high index tantalum-based optical glass to achieve extraordinary optical performance. You’ll see noticeably improved corner sharpness, even less distortion, and reduced vignetting in the corners.

Lens Compatibility. The Speed Booster adapter allows you to use nearly any full-frame F-mount lens. This includes both G and non-G series Nikon lenses, as well as legacy non-AI and AI lenses. Nikon DX (crop-sensor) lenses won’t work with this adapter.

Camera Compatibility. This adapter allows you to use Nikon lenses on crop-frame Sony E-mount cameras and camcorders like the Sony a6300 and NEX-FS700R. This adapter doesn’t provide full-frame sensor coverage.

Wider Focal Length and Increased Aperture. By design, the Speed Booster widens the focal length of the lens mounted by 0.71x, effectively reducing the overall sensor crop factor from 1.5x to 1.07×. Additionally, the adapter increases the maximum aperture of the mounted lens by one stop.

Aperture Ring. The adapter has its own eight-stop aperture ring for controlling Nikon G-series lenses without their own aperture rings. Each stop is labeled, but the ring’s mechanical function is clickless.

Sturdy Design with Built-In Tripod Foot. The aluminum barrel and brass mounts give it a solid feel, with an Arca-Swiss compatible tripod foot that lets you mount the adapter itself directly to a tripod. This ensures the lens’s weight doesn’t put additional stress on the camera’s mount.

What This Adapter Doesn’t Do. This adapter provides no electronic communication with the camera, so you won’t have autofocus, and EXIF data will not be transferred. You can’t set the camera to auto and start shooting; you must make some manual exposure adjustments first.