I bought an inexpensive Bower remote and it sweems to work fine.
I have a choice of firing immediately or 2 second delay.
You don't have to be really in front of the camera. It works from the side and even slightly back from the side. It also works very close up.
So I can have my camera on a tripod and fire it from behind with my hand to the side of the camera.
I think I paid $7 or $8