Sigma 50-120mm f/2.8: The APS-C Tele Zoom That Fits a Jacket

APS-C shooters have always been told the system saves size and weight, then handed a telephoto f/2.8 zoom that weighs almost as much as the camera. Sigma’s new 50-120mm f/2.8 DC OS | Contemporary comes closer than any lens yet to making that promise true at the long end. It is 99mm long, 390g, stabilized, and $799.

Why This Category Matters

The fast tele zoom is the lens APS-C systems handle worst. Fujifilm’s XF 50-140mm f/2.8 covers the range but is noticeably larger, as DPReview’s side-by-side shows. Full-frame shooters get a 70-200mm f/2.8 in every system. APS-C shooters have mostly made do with slow kit telephotos or adapted full-frame glass.

The 50-120mm covers 75-180mm equivalent on Fujifilm X and Sony E, and 80-192mm on Canon RF, DPReview reports. That is the portrait-to-sports range a 70-200mm handles on full frame. It is also a successor in spirit to Sigma’s APO 50-150mm f/2.8 EX DC HSM from 2006.

What Makes It Different

Size is the story. The E-mount version measures 67mm wide by 99mm long, extends about 25% when zoomed, and uses the same 55mm filter thread as the 18-50mm f/2.8. DPReview found it only about 5mm longer than Canon’s RF 70-200mm f/4 when retracted, a lens that is roughly twice the price and a full stop slower.

Stabilization is rated at 6.5 stops at 50mm and 4.5 stops at 120mm to CIPA standards, which matters most on bodies without in-body stabilization. The optical formula uses 18 elements in 13 groups, including one FLD, three SLD, and four aspherical elements, with 11 rounded aperture blades and minimal focus breathing for video. Sony and Fujifilm versions get a dedicated aperture ring with an “A” position. The RF version swaps it for a control ring. It completes Sigma’s ultra-compact APS-C f/2.8 trio and is the only lens in that DC set with both an aperture ring and stabilization.

DPReview’s Richard Butler shot it for about a week on Fujifilm X-T4 and X-H2 bodies. He reported sharpness impressive “even on X-Trans sensors,” swift and reliable autofocus from its linear actuator, and generally soft, attractive bokeh with occasional swirl.

The Catch / Who It’s For

Close focus is the weak spot. At 50mm, corners turn very soft and swirly on flat subjects near minimum focus, though 120mm is more predictable. Butler also wanted a lock for the aperture ring’s “A” position and did not test sports tracking. The lens is too new for an Amazon listing. In the meantime, its two trio siblings share the filter thread and are available now:

Stack Archive’s review of the Sigma 20-60mm f/2.8-4 questioned that lens’s pricing. The 50-120mm makes a stronger value case.

Source: DPReview

Content created with AI assistance and reviewed for accuracy.