A foggy morning on September 23 produced ideal condition for a rarely seen fogbow, as the Sun broke through from the east. The fine mist of water drops that make up the fog and opposite the Sun refract and bounce the light back to the viewer, as in a rainbow. However, diffraction effects from the small mist drops (much smaller than raindrops) causes the colours to blend together, creating a white bow and not the classic range of colours in a classic rainbow. However, with this fogbow the drops were not as small as they could have been and so some colours are visible at the fringes of the bow, here exaggerated by increasing the vibrancy of the colours in image processing to enhance the very subtle colours that were just visible to the eye. © 2010 Alan Dyer Technical: a two-segment panorama taken with a Canon 7D and 28mm lens, metered exposure, taken on Highway 1 east of Calgary.
Bright rainbow created by Sun low in west just about to set with raindrops in the air to the east, and light rain falling at the time. Taken with Canon 7D and 10-22mm lens at 10mm, in two sections, stitched together in Photoshop. Note: bright interior region inside inner bow, darker exterior region, supernumerary arcs along inside edge of inner bow at top, reversal of colours in two bows, and bright red portion of the spectrum from very red sunlight from low sun angle. Taken from southern Alberta, Canada.
Receding thunderstorm and rainbow. Canon 7D camera with 10-22mm zoom lens at 12mm.
