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135 mm F2.8 [T4.5] STF lens
$1,399.99
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$1,399.99
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- Check Camera to Lens Compatibility: https://support.d-imaging.sony.co.jp/www/cscs/lens_body/
- Smooth-Transition Focus design with apodization optics
- Sharp in-focus areas with creamy defocus areas
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What makes the Sony 135mm F2.8 [T4.5] STF lens different from a regular portrait lens?
It uses a Smooth Transition Focus (STF) design with an apodization optical element to produce exceptionally smooth, creamy defocused backgrounds while keeping in-focus subjects sharp. This unique rendering is what sets it apart from a standard 135mm portrait lens.
Is the 135mm F2.8 [T4.5] STF lens sharp in the in-focus areas?
Yes. The apodization element is designed to smooth the background blur, not soften the subject, so in-focus areas render sharply with high resolution at the plane of focus.
Does this lens autofocus?
No, the 135mm F2.8 [T4.5] STF is a manual-focus lens. It features a wide focus ring and a manual aperture ring for additional control over defocus.
Why is the lens listed as F2.8 with a T4.5 rating?
The F2.8 refers to the geometric aperture, while T4.5 is the transmission value, because the STF apodization optics reduce light transmission in exchange for smoother bokeh.
Is the 135mm F2.8 [T4.5] STF compatible with full-frame A-mount cameras?
Yes, this A-mount lens is full-frame compatible. You can confirm your specific camera-to-lens compatibility using Sony's compatibility tool linked in the product details.
What is the focal length and what is it best used for?
It has a 135mm focal length, providing portrait-style compression and a classic medium-telephoto view. It is most popular for portraits and other subjects where smooth background blur and subject isolation matter.
What filter size does the 135mm F2.8 [T4.5] STF lens use?
The lens uses a 72mm filter thread and has a relatively large front diameter for a fixed focal-length lens.
How much does the Sony 135mm F2.8 [T4.5] STF lens cost?
MSRP is listed as $1,399.99. Given that, these models can go on sale from time to time, and there are several other opportunities to save on price like through their group discounts for education, healthcare and military/veterans (ID.me & Unidays) along with their free loyalty program that gives up to 5% back in points.
*FAQ generated on 07/23/2026. Financing, pricing and promotions may no longer apply.