The following photographs show the observation tower located along the boardwalk at Huntley Meadows Park, Fairfax County, Virginia USA. My viewpoint is a meadow east of the tower, facing west toward the central wetland area.
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.
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.
This post includes a link to an audio recording of bird calls by the same Osprey shown in the photos! You may be wondering, “How did you do that?” I used the free “Voice Memos” app on my Apple iPhone to record the bird call in situ. Next I used “Audacity,” a free audio editor, to amplify the recording on my Apple iMac. Finally, I uploaded the amplified version to “Audioboo.” Audioboo is a free tool for audioblogging. (Did I just coin a new term?) Try it yourself — it’s easy!
Editor’s Note: Audioboo provides three options that may be used to embed a player in blog posts: Standard (HTML5); WordPress.com (Flash); and “If all else fails.” For this blog, the Flash version (shown below) is the only option that displays properly on an Apple iMac computer; none of the options displays properly on an Apple iOS mobile device such as iPad.