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Camera review
ISO performance
CANON EOS 6D
CANON EOS 5DMARK III
NIKOND610
We tested our cameras in low light to see how noise impacts on image quality as ISO sensitivity is increased. Lighting remained constant throughout the test and images were converted from Raw files in Adobe Lightroom 5.3, with all luminance and colour noise reduction turned off. It’s safe to dial the ISO sensitivity up to 1600 on any of these cameras, and differences in performance become clear between ISO 3200 and 25,600. Noise degrades image quality in the two Sony cameras much more rapidly, and by their top setting of 25,600, they compare poorly. Images from the Nikon Df are slightly cleaner than the rest, although not by huge margins – the advantage is less than 1EV. Four of the seven cameras top out at ISO 25,600, with the two Canons and the Nikon Df going up further. But these super-high extended sensitivities don’t give you a huge advantage, because image quality makes them all but unuseable.
ISO 200
ISO 200
ISO 200
ISO 1600
ISO 1600
ISO 1600
ISO 6400
ISO 6400
ISO 6400
ISO 25,600
ISO 25,600
ISO 25,600
NIKOND800
NIKONDF
SONYA7
SONYA7R
ISO 200
ISO 200
ISO 200
ISO 200
ISO 1600
ISO 1600
ISO 1600
ISO 1600
ISO 6400
ISO 6400
ISO 6400
ISO 6400
ISO 25,600
ISO 25,600
ISO 25,600
ISO 25,600
Photography News | Issue 5
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