Observing Transit of Venus
By chance, I'll be in Florida on Tuesday when Venus is scheduled to transit in front of the sun. It should be visible from about 6pm onwards.
I thought that a 4x5 view camera might make a good viewer. I've experimented with a pinhole mounted on a lensboard and can make fairly poor images of lightbulb filaments on the ground glass. I'd rather use a lens, but worry about how safe it is. I presume the dangers are targeting a bright light into my eye, overheating the ground glass or damaging the lens. That said, I have taken plenty of pictures with the sun in shot them and not had any problems.