I am currently looking at going to the Tokyo Auto Salon. I am wanting to be well prepared for the low lights that I have seen from other photos of the auto show. I am wondering 1. can you bring a flash with you to the show if anyone that has been there before could fill me in on this, and 2. I am looking at getting the Canon 50mm EF f/1.4 USM lens. Would this be a good lens for the low light that will be in the auto show, and also keep the depth of field close to keep attention on the object I am photographing? I will be shooting with a Rebel XSi and possibly, if allowed a 580 EX II flash. Also what would be good filers to work with inside? Thank you in advanced for the help.