The Speed Booster Ultra is based off the success of the popular Metabones lens adapters.
The Ultra has a new optical design and compresses the image circle from a full frame lens (24x36mm coverage) to fit over an APS-C Sensor or Super 35mm sensor and maintain the same field of view.
In doing so, the compressed image results in one full stop of added light that is reaching the sensor. For example, an f4 lens has the same light transmission, and field of view as a 2.8 Lens, when this adapter is used.
- Front Cap
- Rear Cap
- Detachable Tripod Foot