Zhongyi Lens Turbo (old) 0.72x Focal Reducer Speed Booster Adapter for Sony NEX E A6000 camera
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The Pentax K Lens to Sony E-Mount Camera Lens Turbo Adapter from Mitakon allows K lenses to be mounted on Sony E-Mount APS-C format cameras, increasing the angle of view by 0.726x and the maximum aperture of the lens by 1 f-stop.
The four optical elements of the Lens Turbo adapter condense light from the K full frame lens and project it onto the camera’s APS-C sensor allowing the sensor to capture all of the lens’ transmitted light, negating the 1.5x crop factor and effectively producing full-frame coverage on non-full-frame sensors. A corresponding increase in the maximum aperture of 1 f-stop makes the lens more effective in low-light situations.
The Lens Turbo adapters are compatible with APS-C sized sensors. Although they will physically fit the Sony full frame mirrorless cameras, the camera must be set to Crop Mode to fully support the speed booster’s functions.
Cannot be used on Sony E mount full frame camera.