The image below is of the Gegenschein taken with my 28mm wide angle lens with a 59s exposure on November 1st., from a dark site outside Tabuk, Saudi Arabia.
I confirmed that it was not a vignetting effect in the lens by taking another image with it offset from the centre, towards the left of the field, and the glow was detected in exactly that position. The Gegenschein was quite obvious on the back screen of the camera, but when I downloaded the raw image onto my laptop it disappeared. I was able to enhance the brightness of the image to reveal it once more.
M33 can be seen in the lower right hand corner.
If you want to find out more about this phenomena there is more information here