This is exactly my issue. If it was all blue or all yellow, I could understand that but the center is muuuuuch cooler than the edges and the edges get continually warmer as it goes. I will keep messing with it but at this point I will likely just send my color film in to be processed and captured until I can get better at it. The black and white film has been wonderful to capture so I will keep using that to boost my confidence! :)