![]() These instructions also apply to the Rescharts Slanted-edge SFR module, which is performs identical calculations with a more interactive interface. A standardized sharpening algorithm can be used to compare cameras with different amounts of sharpening ( not recommended for camera development or lens testing). Imatest SFR also measures Chromatic aberration and noise. New ISO 12233:2014 test chart (right – supported with a high degree of automation in eSFR ISO) Old ISO 12233:2000 test chart (left) with Imatest SFR cropping indicated by the red rectangle ![]() ![]() Imatest SFR measures spatial frequency response, also known as the Modulation Transfer Function (MTF), of digital cameras using a slanted-edge (light-to-dark) target, as described in Sharpness: What is it and how is it measured? Although it doesn’t provide the as strong a visual indication of MTF as wedge or sinusoidal chats (such as Log Frequency), it provides a more accurate quantitative measurement and uses space much more efficiently. Setting up and photographing SFR test charts
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