A steady train of plane waves impinges normally on a right circular cylinder of infinite extent. The nearfield diffraction patterns for the normalized rms pressure were computed for values ofkafrom 1.5 to 6, wherekis the wavenumber andais the radius of the cylinder. Charts are given, showing the contours of rms pressure forka=1.5, 2, 3, 4, 5, and 6, for each of two boundary conditions, pressure reflecting and pressure release. Each chart shows the contour pattern out to a distance of ten radii. The computed expressions are infinite series containing Bessel functions and their gradients. In some cases 75 terms in the series must be evaluated to get convergence to within 1%. The charts show that there are substantial areas where the pressure differs from the undisturbed value by 6 dB or more. Similar charts are given for the diffraction patterns at a sphere.