Sigma sd Quattro H delivers high image quality

March 2017 issue Tech

The Sigma sd Quattro H is the first camera to feature the newly developed APS-H size Foveon X3 Quattro direct image sensor with 51-megapixel equivalent resolution (1.3x crop factor). Three layers of photodiodes—red, green, blue—means there’s no need for a low-pass filter to correct for interference caused by a color filter array. This results in exceptional detail and nuanced color gradations. DNG raw is supported for compatibility with Lightroom and other programs, along with Sigma’s... Continue Reading >

Product review: Sigma Sport camera lens is super glass

March 2017 issue Tech

Advances in the design of super-telephoto prime and zoom lenses mean that sports, wildlife, and bird photographers have never had a better selection of glass to choose from. Sigma Corp. released its 150-600mm F5-6.3 DG OS HSM Sports lens a year ago, and I was excited to receive it for review recently so I could compare its performance to that of the AF-S Nikkor 200-500mm f/5.6E ED VR and the AF-S Nikkor 200-400mm f/4G ED VR II (“Big, Heavy, Awesome,” July 2015).Sigma Sports lenses are... Continue Reading >

Lens trifecta

January 2016 issue Tech

Sigma 24-35MM f2 DG HSM art lensExceptional quality, short focal length range, large-aperture zoom, great price—who doesn’t yearn to find that trifecta in a lens? Sigma’s 24-35mm F2 DG HSM Art lens is a winner in all three heats. But it comes with some cost: The zoom range isn’t large, and it’s not what anyone would call a small or lightweight lens.With high-end wide-angle zoom lenses the focal length range is around 2.5X or less; anything beyond that seriously tests the limits of... Continue Reading >