{"product_id":"used-sony-135mm-f2-8-t4-5-stf-sal135f28","title":"USED Sony 135mm F2.8 [T4.5] STF [SAL135F28]","description":"\u003cp\u003eThe STF (Smooth Trans Focus) lens is a lens that achieves smooth, ideal bokeh, regardless of foreground or background blur, thanks to its apodization optical element. It eliminates the \"onion ring\" effect and \"cut-out\" bokeh of point light sources caused by aperture obstruction, allowing highlights to spread naturally, resulting in images with a natural, three-dimensional feel that leverage bokeh. Naturally, the in-focus areas are rendered with sharp, crisp detail. Creative expression is possible with the manual aperture ring, which can be finely adjusted up to T4.5-6.7, and the circular aperture. STF Lens Pursuing Ideal Bokeh In a normal lens, the amount of light passing through the center and the periphery is the same, so the bokeh also forms uniform circles. The STF lens, with its \"apodization optical element\" special effect filter, reduces the amount of light passing through the periphery of the lens. Consequently, the bokeh also becomes thinner towards the edges of the circle. Therefore, images rendered with the STF lens's soft circles achieve smoother and more beautiful bokeh than images depicted by a collection of uniform circles. Regarding the T-number of STF Lenses Due to the \"apodization optical element\" in STF lenses, the total amount of light gathered through the lens is less than with normal lenses. For this reason, it is indicated by a T-number, not an F-number, which is determined by the lens's aperture and focal length. It represents the actual brightness of light gathered through the lens and is the same as the F-number for determining exposure.\u003c\/p\u003e\u003cul\u003e\u003cli\u003eManual focus only lens\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIncluded Accessories\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHood, Case\u003c\/p\u003e","brand":"CFJ","offers":[{"title":"Default Title","offer_id":54106937262373,"sku":"2449040056727","price":409.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5816\/3493\/files\/2449040056727-1-1.jpg?v=1794115826","url":"https:\/\/camera-factory-japan.com\/products\/used-sony-135mm-f2-8-t4-5-stf-sal135f28","provider":"Camera Factory Japan","version":"1.0","type":"link"}