Ronkonkoma, N.Y. — Sigma of America said Monday that it is releasing a Geometrical Modulation Transfer Function (MTF) chart and a Diffraction MTF chart for use in measuring the performance of all of ...
Add Yahoo as a preferred source to see more of our stories on Google. LONDON (Reuters) - Drum and bass duo Sigma topped the British music singles chart on Sunday with their track "Changing" featuring ...
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