Every December lighted boats...and Santa...come down the Petaluma River to the turning basin. This year I decided to try to photograph it via one of my photography Meetup groups. A big challenge! I did bring my tripod because I knew by the time the boats came it would be dark, but I did not have a technique to take photos of moving objects in the dark! It was a learning experience...I think. Next year I will research it better. I was using Av priority and perhaps Tv priority would have worked better.