If you’ve turned the shutter speed dial on your camera past 30 seconds, you might have noticed the strangely named “Bulb” mode. This is a throwback from the first film cameras, but it’s still useful today.
In the early days of photography, it took a long time to take a photo.
Even a well lit portrait could need a few seconds; the chemicals they used just weren’t as light sensitive as a modern digital sensor. Photographers had to control the exposure time themselves if they wanted to make sure they got a good image.One of the ways they did this was with a small bulb and a pneumatic shutter. When they squeezed the bulb, it pushed air into the pneumatic system that opened the camera’s shutter. As long as they held the bulb down, the shutter would…
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