Attach a Canon EF-mount lens to your Sony FS7 Mark II camera with little effort by using the Metabones Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71× V. It boasts an all-new optical design, which comprises five elements in four groups, along with an ultra-high index, tantalum-based optical glass element. This booster offers a 0.71× magnification which helps reduce the crop factor of the camera from 1.5× to 1.07×. It booster helps the lens deliver amazing optical performance with improved corner sharpness and distortion, as well as reduced vignetting. As this speed booster is powered by the camera body itself, no external power source is required. The LED light on it indicates the operation mode in use, optical image-stabilization activity, and communication status.
This is the magnifying factor of a lens. Macro lenses will often be described by their “magnification factor”. A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject.
The individual pieces of glass that form the overall optical construction. Most lenses have between four and eleven elements to bend the light rays to ensure a perfectly formed image appears on the light sensitive surface, such as a film or CCD. The elements are arranged in groups and may be seen in specification sheets as, for example, 6 elements in 4 groups. That configuration may have two single elements and the other four grouped in pairs.