Shooting during the ceremony is always a concern. Most of the time it is not allowed, and if so, flash is out. I have earned permission from several Temples by demonstrating that I can shoot quietly, with no flash, and from a stationary position in the back. Here I used a Canon Elan because it is the quietest SLR I have ever used. This was shot on Kodak Pro 400, which was pushed a stop to 800, using a Canon 70-210 f4 zoom at the 210mm end. I think the exposure was 1/20th at f4.