A.M. asks:
In what setting would I use Bulb on my 35mm camera. I read a little about it and I know that it's only for low light, I just don't know to what extent. I know that I would use it if I were doing something like the demonstration that you did today, but are there and other applications? Like how about night scenes with streetlamp glow? Will it hurt the rest of the film if there is too much light when I use it?
Thanks
Reply: Generally cameras that have bulb only have shutters that stay open for 2 seconds at the most. If you are shooting a night scene and perhaps want a small f/stop to have greater depth of field, you might want a 10 second exposure. You might have to guess the exposure since the light meter won't help you out at this point. It is possible to overexpose. Often photographers bracket their shots ( take many shoots at different exposures) You could use bulb and manually count for let's say: 10 seconds. Abelardo Morell make rooms into a camera obscura and shoot a 8 hour exposure. http://www.abelardomorell.net/photography/cameraobsc_01/cameraobsc_22.html