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In-depth reviews from TechRadar's team of experts. To find out how we review products and calculate our scores, check out our reviews guarantee.

16 products

  1. Sigma DP1 Merrill review

    Sigma DP1 Merrill review

    6  

    Sigma has squeezed the Foveon x3 sensor from the SD1 Merrill DSLR into this compact camera. It's not your average compact.

    Last reviewed

    Sigma SD1 Merrill review

    Sigma SD1 Merrill review

    6  

    The Sigma SD1 Merrill offers a cutting-edge 45MP sensor in a basic body at a new, knock-down price. Is it worth shelling out for?

    Last reviewed

    Sigma 120-300mm f/2.8 EX DG OS HSM review

    Sigma 120-300mm f/2.8 EX DG OS HSM review

    9  

    The Sigma 120-300mm f/2.8 EX DG OS HSM is a cheaper option than Nikon and Canon's astronomically expensive (although superb) pro telephoto lenses. With the new model you get optical stabilisation (OS), and the whole thing adds up to a lens that is far from a lightweight.

    Last reviewed

    Sigma SD15 review

    Sigma SD15 review

    6  

    Sigma's Foveon X3 sensor design is unique, but does the SD 15 move it any further forward?

    Last reviewed

    Sigma DP1s review

    Sigma DP1s review

    6  

    A solid camera at a keen price, but speedy it ain't

    Last reviewed

    Sigma DP1 review

    Sigma DP1 review

    9  

    Few cameras are announced a full two years before they hit the shelves in your local camera shop. But the Sigma DP1 was destined for a long and difficult birth.

    Last reviewed

    Sigma 10-20mm f/4-5.6 EX DC HSM review

    Sigma 10-20mm f/4-5.6 EX DC HSM review

    6  

    At the budget end of the market, Sigma and Tamron are the major scrappers and Sigma's 10-20mm lens is the cheaper of the two. Despite its low cost compared with lenses from Nikon and Canon, the Sigma feels robust and has silent HSM autofocus

    Last reviewed

    Sigma EF-500 DG ST review

    6  

    The Sigma EF- 500 DG ST is the flashgun for those who think sizematters. It has the largest dimensions on test and is sure to get usersnoticed when they're out and about. The budget price is matched by the plastic feel and lack of LCD display

    Last reviewed

    Sigma 8-50mm f/2.8 EX DC Macro review

    Sigma 8-50mm f/2.8 EX DC Macro review

    10  

    The first surprise of this lens is that it doesn't feature a whisper-quiet hypersonic Sigma motor. Instead, you get a conventional focus ring by the front element, which doesn't enable manual override in Autofocus mode.

    Last reviewed

    Sigma SD14 review

    Sigma SD14 review

    8  

    Sigma has gone out on a bit of a limb with the SD14 SLR and the unorthodox Foveon sensor it contains. The camera has 50 per cent more resolution than the SD9 and SD10 cameras that came before it, but it still only manages to deliver 4.7-megapixel images

    Last reviewed

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