Sony 135mm f/2.8 - f/4.5 STF Alpha A DSLR Mount Lens

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About Sony 135mm F/2.8

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.

A unique telephoto lens for smooth, natural focus effects in foreground and background.
• This 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. Mounted on the Sony a (alpha) DSLR-A100 camera, this lens provides a 200mm focal length (35mm equivalent).

Sony 135mm F/2.8 Features

  • Smooth Transmission 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 ofthe frame for a pleasing aesthetic effect.
  • Transmissive Brightness:
  • 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.
  • Wide Focus Ring:
  • The dedicated manual focusing system is controlled by a wide focus ring that's comfortable to hold and gives you a solid, hands-on feel for pinpoint focusing of your subject.
  • Circular Aperture:
  • Because aperture blades form a near circle at the wide openings used for low-light shots, spot-light sources have a pleasing circular defocused effect.

Sony 135mm F/2.8 Specifications

135mm f/2.8 (T4.5) STF Telephoto Lens

Smooth Transmission Focus system for pleasing effect
Apodization Lens Element smoothes out-of-focus areas
Subjects stand out vividly against smooth, even backgrounds
Manual focusing with comfortable wide focus ring

Circular Aperture gives spot-light sources a circular shape
Manual aperture ring adjusts from T 4.5 to T 6.7
Focal Length

35mm Equivalent: 135 mm
APS: 202.5 mm
Angle of View

35mm Equivalent: 18 deg
APS: 12 deg
Min Focus Distance
2.85 ft (87 cm)
Aperture Maximum
f2.8 (T=4.5)
Aperture Minimum
f31 (T=f32)
Maximum Magnification
Lens Construction
6 elements in 8 groups with 9 aperture blades
Filter Diameter
72 mm
Lens Dimensions
3-1/8" x 3-7/8" (80 x 99 mm)
Lens Weight
1 lb 9-3/4 oz (730 g)
Mfr #

Sony 135mm F/2.8 Reviews

Reviewed by 1 customers

(1 of 1 customers found this review helpful)


The King of the Bokeh!


from Undisclosed

This lens is the only reason to go with A-mount! The bokeh is extremely creamy and smooth. I guess they used 'smooth' in the name for a reason. It does take some practice to get the best out of the lens and the bokeh is best when used at 2.8 (4.5 effect) but when all the ducks are in a row and you've nailed the shot, you could find yourself staring at the photo all day long :-) I wouldn't have been able to use the lens without focus peaking function in a camera body. It helps tremendously and I don't know how people managed before without it. You may find that the lens will challenge your old way of composition. For example, instead of trying to keep distracting objects and background out of your subject, now you can consider including them to see if they become pleasing bokeh to compliment your subject. I am sure some other lenses, A-mount or not, can also produce pleasing bokeh under right conditions but based on many comparisons (you can search online), I still feel this lens comes on top. This lens is sharp and its transition from sharpness to defocused area is very smooth. If you are thinking about getting this lens, I'd say get it, learn how to it, and enjoy it.


Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  I understand that this is a manual focus only lens, and that it doesn't work with focus verification. How about with cameras like the A77 and A99 -- Will focus peaking work with this lens?
DANIEL C  Yes, it does. In my opinion focusing is even easier than auto-focus with the peaking of my A99.

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Product Profile: Sony 135mm f/2.8-4.5 STF Smooth Transition Focus lens

In 1985, shortly before the world's first autofocus SLR camera was introduced, Minolta dazzled the photographic world by introducing the 135mm f/2.8 STF lens.Read More

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