These are the best Sigma lenses for bokeh when you want luxurious background melt, smooth highlight disks, and flattering compression for portraits, weddings, lifestyle, products, and cinematic video—across full frame and APS-C—and here’s what to look for as you buy: favor fast apertures (ƒ1.2–ƒ1.8 for primes; constant ƒ2.8 for zooms), rounded/ample blade counts for round stops as you close down, minimal longitudinal CA (to avoid green/magenta fringing in blur), low “onion-ring” texture from aspherics, controlled cat’s-eye vignetting toward the frame edges, pleasing mechanical vignetting, close-focus for larger blur circles at the same framing, and focal lengths that compress (85–135mm FF is the bokeh sweet spot); video shooters should check focus breathing and choose lenses with quiet, linear-feel AF, while travelers may balance speed with carry weight. Full-frame portrait royalty starts with the Sigma 105mm f/1.4 DG HSM | Art (“bokeh master”)—creamy falloff, big entrance pupil, and painterly transitions—paired with the Sigma 85mm f/1.4 DG DN | Art (lighter, razor-sharp eyes, plush background), and the Sigma 135mm f/1.8 DG HSM/DG DN | Art for tele compression and spotless speculars; for classic normal perspectives with modern blur, the Sigma 50mm f/1.4 DG DN | Art renders smooth, neutral bokeh with minimal color fringing, while the Sigma 35mm f/1.2 DG DN | Art delivers dramatic wide-normal separation for environmental portraits and night scenes. Characterful compact options include the I-Series 65mm f/2 and 90mm f/2 DG DN | Contemporary—tiny, metal, and surprisingly gentle background rendering—great when you want a travel-light look that still separates. Macro bokeh with detail control belongs to the Sigma 105mm f/2.8 DG DN Macro | Art, which pairs crisp subject planes with rounded, non-distracting highlights for beauty and product close-ups. Zooms that blur beautifully: the Sigma 70–200mm f/2.8 DG DN OS | Sports (buttery, consistent bokeh through the range with excellent stabilization), the Sigma 24–70mm f/2.8 DG DN | Art for weddings and lifestyle (smooth mid-tele backgrounds at 70mm), and the Sigma 100–400mm f/5–6.3 DG DN OS | C, which, despite slower apertures, delivers strong compression and pleasant blur for outdoor portraits and candids; DSLR APS-C shooters get a unique bokeh machine in the Sigma 50–100mm f/1.8 DC HSM | Art—prime-like separation across a zoom. On APS-C mirrorless, the compact DC DN trio shines: Sigma 56mm f/1.4 DC DN | C (portrait gem with creamy edges), 30mm f/1.4 DC DN | C (normal with soft, neutral highlights), and 16mm f/1.4 DC DN | C (wide with surprisingly clean background for environmental subjects). Practical buyer tips: pick 85–135mm on full frame (or ~56–90mm APS-C) for the most forgiving, creamy separation; if you often stop down to f/2–f/2.8, choose lenses with round blades that keep bokeh circular; test for axial CA on backlit scenes and favor DN versions for improved correction and breathing; if you shoot events, a 24–70/2.8 plus one fast prime (50/1.4 or 85/1.4) covers nearly every look; standardize filter sizes for a single diffusion/VND, and use close-focus creatively to magnify blur. Shooting tips: give subjects generous distance from the background, shoot near wide open and step down 1/3–2/3 stop for eyelash crispness without losing cream, align bright speculars behind your subject for pleasing bokeh balls, use longer focal lengths for compression when space allows, and mind minimum focus distance to avoid nervous edges—these Sigma picks render smooth, deep, and tasteful bokeh that flatters faces, elevates products, and adds cinematic depth to your frames.