The Sony 135 mm f/ 2.8 [T4.5] STF
The characteristics of the Sony 135 F2.8 [T4.5] STF (SAL-135F28)
Telephoto lens with a focal length of 200 mm (35 mm equivalent), featuring Smooth Trans Focus mode and special optical elements providing exceptionally soft transition from focused area to out-of-focus blur.
An apodized optical element distributes beams of light in the way for out-of-focus background to contract with subjects in focus,
A broad focus ring and aperture control ring provide additional control of out-of-focus area.
Filter rotation on focusing: no
Barrel extension on focusing: yes
The focus ring does not rotate in AF mode.
Max. magnification: 0.25
The Sony 135 mm f/ 2.8 [T4.5] STF (SAL-135F28) is equipped with two apertures. The primary 9-blade aperture is controlled by the camera, the secondary 10-blade aperture is activated by a dedicated aperture control ring in stepless aperture mode (from f/4.5 to f/2.8). APD elements allows you to achieve a softer bokeh in manual mode than that in AF mode.
The Sony 135 mm f/ 2.8 [T4.5] STF (SAL-135F28) features special optical elements ensuring pleasant-looking out-of-focus blur, an internal APD filter (two elements in one group), and a 10-blade aperture (stepless aperture setting).
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Posted by: shubshik Date of publication: 02.10.2010