Photography Tips for Your Sailing Vacation   Photography on an ever-moving sailboat presents many challenges. After studying the pictures from my most recent sailing adventure in Corsica and Sardinia, there are several tips I can offer. Taking pictures like this one was risky. The picture of moving sailboats was taken at 195mm at f/8, 1/125, ISO200, from a sailboat traveling at 8 or 9 knots. It would have been much safer to go with a higher shutter speed, at the sacrifice of either ISO causing more noise or aperture reducing the depth of field, and risking…