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Sony 135mm F/2.8 STF (Alpha)


• A-Mount Lens/Full-Frame Format
• Aperture Range: f/2.8 to 31 | T4.5 to 32
• Apodization Elements for Smooth Bokeh
• Manual Focus Design
• Minimum Focus Distance: 2.9'
• Manual Aperture with Ten-Blade Diaphragm
• Auto Aperture with Nine-Blade Diaphragm

Sony 135mm F/2.8 STF (Alpha)

Sony 135mm F/2.8 STF (Alpha)
Sony 135mm F:2.8 STF + 72mm UV Filter Bundle
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This telephoto prime lens is optimized for full-frame A-mount cameras, however it can be used on APS-C models where it will provide a 202.5mm equivalent focal length. Optical design incorporates Smooth Trans Focus technology, which uses an apodization element that helps to improve the quality of bokeh. This element, which resembles a radially graduated ND filter that tapers from clear in the center to more dense around the edges, produces more circular out-of-focus highlights for more pleasing selective focus and shallow depth of field effects which still rendering the subject in sharp focus.

An aperture range of f/2.8 to f/31 is available, however the implementation of the apodization filter renders this range as T4.5 to T32.

This lens incorporates two separate aperture diaphragms in order to provide more control over operation and image quality. When shooting near wide open, from T4.5 to T6.7, the manual aperture ring offers a rounded 10-blade diaphragm for smoother and more circular bokeh. For ease of use, there is an electronically controlled aperture which has a rounded nine-blade design for smooth out-of-focus elements.

This lens uses a manual focus design to provide tactile control over focusing during use. It can also focus as close as 2.9'.

Compatible with Sony's line of teleconverters, shooters can easily add the 1.4x or 2x versions to create 189mm f/4 [T6.3] or 270mm f/5.6 [T9] optics, respectively.                         


Focal Length 135mm      
Comparable APS-C Focal Length: 202.5 mm
Aperture Maximum: f/2.8    
Minimum: f/31    
Camera Mount Type Sony A      
Format Compatibility 35mm Film / Full-Frame Digital Sensor  
Angle of View 18°      
Minimum Focus Distance 2.85'; (87 cm)    
Magnification 0.25x      
Maximum Reproduction Ratio (1:4)      
Elements/Groups 8, 6      
Diaphragm Blades 10, Rounded    
Image Stabilization No      
Autofocus No      
Tripod Collar No      
Filter Thread Front: 72 mm    
Dimensions (DxL) Approx. 3.15 x 3.90" (80 x 99 mm)  
Weight 1.61 lbs (730 g)