Sigma's mirrorless 10x ultra-tele zoom — the first 60-600mm, for Sony E and L-Mount.
The Sigma 60-600mm f/4.5-6.3 DG DN OS Sports is the world's first 10x ultra-telephoto zoom designed for mirrorless cameras, announced on 12 January 2023 and shipping from mid-February 2023 in Sony E and L-Mount. It is the mirrorless successor to the popular DSLR-era 60-600mm 'Bigma' and anchors the long end of Sigma's Sports line, offering an unmatched 60mm-to-600mm range in a single lens.
Construction is 27 elements in 19 groups with two FLD and three SLD elements, a nine-blade rounded diaphragm and a large 105mm front filter thread. Autofocus uses Sigma's HLA linear motor, and the OS2 stabiliser delivers up to 7 stops at the wide end and 6 stops at 600mm. The barrel mixes magnesium alloy, carbon-fibre-reinforced plastic and Thermally Stable Composite to keep weight to 2,495g, with full dust- and splash-resistant sealing, a focus limiter, custom modes and an Arca-compatible tripod foot. A handy party trick is the 1:2.4 maximum magnification at 200mm, giving genuine telephoto close-up capability, and the L-Mount version accepts Sigma teleconverters.
For UK buyers this is the definitive do-everything wildlife zoom on Sony E and L-Mount: nothing else native offers 60-600mm, and rivals such as the Sony 200-600mm f/5.6-6.3 G start at 200mm and cost more used. Reviewers praised its surprisingly strong sharpness at 600mm and its fast HLA focusing, with the obvious caveat of its 2.5kg heft. Used copies typically undercut the roughly £1,999 UK launch price by a healthy margin, making it a strong-value alternative to first-party super-telephotos for birders and airshow photographers.
On a used example, work the huge zoom range and check for grinding or zoom creep (there is a lock switch at 60mm - confirm it holds), listen for loose element rattle beyond the normal OS float, and shoot test frames at 600mm wide open to confirm centring, as decentring shows quickly at this focal length. Verify the OS switch positions all function, the tripod foot and strap lugs are secure, and the 105mm front thread is undamaged since filters at that size are expensive. Ask whether the original hood and padded case are included, and check the firmware is current via an L-Mount body or Sigma USB Dock workflow. Given the weight, inspect the mount bayonet for wear or play from prolonged unsupported carrying.