Got a bag of old lenses but want to try a new camera body? A new accessory will mount those large SLR lenses on small mirrorless models — and deliver an improved maximum aperture as well.
Manufacturer Metabones and optics developer Caldwell Photographics say their Speed Booster lens adapter will mount SLR lenses on mirrorless cameras — and deliver a full stop of increased aperture, which “allows for shallow depth-of-field and a lower ISO setting for decreased noise,” the companies say.
The adapter reduces focal length by 0.71x for a wider effective lens. The first $600 adapter mounts Canon EF lenses on Sony NEX bodies. Other options are in the works.