Metabones EF to E Speed Booster Ultra
The Metabones EF to E adapter converts any Sony E mount camera to use EF mount lenses. The Speed Booster Ultra in particular allows full-frame EF lenses to cover APS-C or S35 sensors on E-mount cameras by downsizing the viewing angle, consequently giving the lens an extra stop of light. For example, an F2.8 Canon photo lens might become F2.0 with this adapter on an FX30, FS7, or other equivalent Super 35mm camera.
NOTE: It is not recommended to use this adapter between a full-frame lens and a full-frame camera.
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