The Sony SAL-20TC AF 2x (D) Teleconverter will increase the focal length of a lens by 2x, and reduces the lens aperture by approx. 2 f/stop. It was specifically designed to provide full AF compatibility with a select range of Sony (or equivalent Minolta) pro-level G-series lenses (with Minolta, only with Maxxum 7/5/4/3 or newer cameras). For example, using a 2x teleconverter with a 300mm lens will effectively increase the focal length to 600mm. A lens set to f/2.8 will now be f/5.6.
Note: Due to the high-quality design of this converter (6 elements/5 groups), the teleconverter will only fit and work with a select range of lenses, and only the following Sony lenses are compatible:
Only the following Minolta lenses are compatible:
Note: The following Minolta or Sony lenses can only be used in Manual Focus mode: