I am a pretty serious amateur photographer. A recent innovation that is popular for us types is a reflector, that is basically just like the collapsible windshield screens for cars.<br><br>You know the kind, you grab it, give it a couple of twists, and it folds down into the size of a dinner plate?<br><br>Well, they make these for photography now, in a variety of sizes. I saw one that was folded down to about 8 inches or so. They often have a gold reflector on one side, and silver on the other. Weigh very little.<br><br>Seems like if a guy is moving around by car, and thinks he might need to signal someone in the air, this could be very useful. For about 10 oz, you could have basically a mirror that is two feet around! <br><br>Here's one source, I'm sure there are more:<br><br>http://www.creativedesignbackgrounds.com/accessories.html<br><br>JustBob.

I guess I should have said that because of their intended purpose (reflecting natural light onto a photo subject) these devices should be MORE reflective than what we use in our cars.<br><br>However! The ones that many of us have in our cars already would make quite a good reflector if necessary.<br><br>JustBob.