Circumscribed Halo

An Oval Circumscribed Halo and 22° Halo observed from the Hollin Meadows Swim & Tennis Club, Fairfax County, Virginia USA.

The circumscribed halo is typically a brightly coloured oval around the sun. It is tangential to the inner 22º halo directly above and below the sun and it is brightest there. Sometimes local brightenings of the 22º halo are the only sign of it. Its shape depends very much on the solar altitude. Source Credit: Atmospheric Optics

I used a fence post to block the disc of the Sun and shot the photos at -3 exposure value (ev). The camera LCD was so dark it was like looking at the Sun through welder’s glass! Photo 2 (of 2) also shows a contrail.

Circumscribed Halo Circumscribed Halo

Tech Tips: The following camera settings were used: ISO 100; focal length 4.5mm (25mm, 35mm camera equivalent); -3 ev; aperture f/8; shutter speed 1/2,000 second.

Copyright © 2013 Walter Sanford. All rights reserved.

One Response to “Circumscribed Halo”

  1. Top 10 Photos of 2013 (plus 10) | walter sanford's photoblog Says:

    […] 15 MAR 2013 | Hollin Hills | Circumscribed Halo […]

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