Olympus M.Zuiko Digital 45 mm f/1.8
7. Coma, astigmatism and bokeh
Also the astigmatism doesn’t create any problems. An average difference between vertical and horizontal MTF50 function values amounted to 5% which is a value so low that can be considered negligible.
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Out-of-focus images of a diode, taken at different aperture values in the centre and in the corner of the frame are presented below.
