When I upgraded from my Spyder 2.0 to the 5.5 Pro I had the option of a lens Calibration target 🎯 or a grey/white/black cube type target. I had some focus issues with my Nikon D7000 and my 35mm 1.8 lens. I tried calibrating them with a paper target, with poor results. I was using the camera and lens for shallow dof portraits. After calibrating with datacolors target my focus issues are much improved.
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