MTF50 for 25mm Lenses by Region

The Imatest MTF50 analyses are replotted using a log scale for aperture below to better separate performance values of f/2.8 and faster. The center weighted average uses an analysis of 13 points of interest weighting (center - 1.0; part-way or mid-zonal - 0.75; corner - 0.25). Regional MTF50 is also plotted for the center region (1 point), the midzonal region (8 points) and the corners (4 points).