As yesterday was such a nice day I thought I'd get some more practice with my Sigma 170-500mm lens and take a few shots of the aircraft flying over my house.
And I need some more practice
Anyway I took this shot of a DHL aircraft and it's ok but I see rings in the blue sky and I've no idea what I've done to get them.
Camera Canon 350D, Lens Sigma 170-500mm, ISO 200, f5.6, Shutter speed 1/640
Focal length 500mm, Exsposure mode Apeture priority, No flash. Hand held.
All that I have done in PS is to run "Auto Smart Fix" and saved for the web.
Many thanks in advance for all help and advice given
