These photos were taken at Lake Ballard, 50 kilometres out from Menzies, a remote part of Western Australia on 11 September 2008 about 12:30 pm, using an Olympus E520 10 megapixel SLR.
I was with 3 other people, we all took pictures, none of us saw anything in the sky. We could see 360 degrees around and from the top of the small hill from where I took these pictures, I could see many miles in every direction. When I downloaded my pics, I found these two with 'spots' in them. I have no idea what they are.
I took over 80 pics there, only these two have aberrations, none of those taken before or after have any such 'marks'. I attach enlargements of the 'spots'.