----- Original Message ----- From: "Tanya Mayer Photography" <[EMAIL PROTECTED]>
(snip) > > I was showing them to tv last night and he pointed out a phenomena that > neither of us can explain. I did not use any filters, and the equipment was > *istD, and FA 50mm f1.7 lens at around f2.8. If you have a look on this > page, > > http://www.tanyamayer.com/runnamucklocation/index_6.html > > ...you will notice that there appears to be a blue band vertically about a > quarter of the way across each frame. I have cloned this out on the prints, > but I am at a loss to explain it's presence. Any ideas? I used the same > setup for the silhouettes that I shot the following day (including the PUG > shot) and the band wasn't present in the second lot. > Tan, There's no defect in your equipment or technique. This is an entirely natural phenomenon that most peoples brains would filter out when they see it in the real world, but in a photograph it's locked in and can't be unconsciously avoided. For most of the day the sky is between the sun and the viewer, but at twilight the sky is above the sun relative to the viewer's position. As twilight progresses the directly sunlit sky retreats upwards, but the edge (or more correctly the bottom surface) of the sunlit zone is visible because of dust and water vapour in the air. .Sometimes a distant cloud, perhaps even over the horizon, casts a shadow into the sky which creates a 'step' or 'notch' in that surface, and that is the change of brightness that you photographed. BTW, damned fine photographs. Your enthusiasm and motivation has brought you a verrrrry long way since the PZ1p (or was it a Z1p) incident. regards, Anthony Farr
