A stunning day and a photographer's dream...no wind, no rain, just intense, low sunshine behind you. Perfect. I spent four hours in and around Marazion and Little London beaches. 350 shots later, I was more than pleased with the mornings haul. Nothing rare but some very photogenic birds. Given the bright conditions, the all-important shutter speed was naturally high, sometimes up to 2000th second. Aperture was set to f/9. ISO was set to 250. Exposure -0.3 . WB changed to Sunshine. The camera was used in FX Full Frame mode and I used the 1.7x TC with the 600mm F/4 lens thus equating to about 1000mm focal length.