Sony 135mm f2.8 STF Telephoto Lens

The Sony 135mm f/2.8 STF Telephoto lens is a unique telephoto lens for smooth, natural focus effects in foreground and background. The Sony 135mm f/2.8 (T4.5) STF Telephoto lens is an advanced STF (Smooth Transition Focus) telephoto lens incorporates an apodization optical element that distributes light rays to create smooth, aesthetically pleasing out of focus backgrounds that make sharp focus subjects stand out more vividly. This lens provides a 200mm focal length (35mm equivalent). Create smooth, aesthetically pleasing out of focus backgrounds that make sharp focus subjects stand out more vividly with the Sony SAL-135F28 special purpose lens.

Sony 135mm STF Telephoto - Focus
While subjects remain in sharp focus, out of focus backgrounds or foregrounds are blurred smoothly and evenly with gradation that thickens toward the edges of the frame for a pleasing aesthetic effect. After light passes through the apodization element, the lens aperture of f2.8 yields a T (transmissive brightness) equivalent of 4.5 a manual aperture ring can adjust T setting from 4.5 to 6.7.