Composite image of NGC 6217 in the U (blue), B (green) passbands, and Hα line (red) with the logarithmic spiral segments and the ring (yellow lines) overlaid. The yellow-black-yellow circles on the curves of the arm and ring correspond to the projected positions of the local maxima of brightness. The areas of flux measurements in apertures are bounded by magenta ellipses (segments). Examples of elliptical apertures are shown in magenta. The size of the image is 120 × 120 arcsec². North is upward and east is to the left.