101 three sixty five

A graphical analysis of the sharpness of some of my lenses:

The horizontal axis represents the f-stop, that is the focal length of the lens divided by the diameter of the aperture. The vertical axis is an arbitrary scale, similar but not equal to, the resolution of the lens in lines per millimeter.

While I have not attempted to determine any systematic errors in this data, the sharpest apertures, the "sweet spots", of the three lenses can be seen from this plot.

NOTE: The 24-120vr lens was hand held with the VR function turned on. The 35 and 60mm lenses were bolted to a tripod for this test.

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