On Wed, Jun 04, 2008 at 09:28:26PM -0600, William Robb wrote: > Please see: > http://users.accesscomm.ca/wrobb/temp/weirdness.html > > Shot with the k20 and 70mm LTD. > ISO 100, f/7.1 at 1/400th. > > The sun was well out of the picture. > > Or is it just me.... > > William Robb
Welcome to the wonderful world of digital image quantisation. If you look at the pixels with something that shows you the RGB values you'll see that the perceived circular arcs are places where one of the components (most often the red channel) changes. Unfortunately the human eye is exceptionally good at spotting subtle changes like this, correlating them, and presenting them to your visual cortex with the edges contrast-enhanced. These kinds of artifacts are far more common in digital image synthesis - it's rare for a captured real-world image to have large, smoothly varying areas of approximately the same colour. You've tripped over one of the uncommon natural occurrences. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
