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by garik

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7
votes
3answers
1k views

how the camera determines correct aperture and ISO in bulb mode?

Consider that the camera is in shutter priority and the exposure time is set to bulb mode. Now the camera doesn't know how long the shutter is going to be open in advance and so how does the camera ...
14
votes
3answers
715 views

What is Bulb Mode?

My camera has a 'bulb mode,' and several questions on photo-SE refer to using Bulb Mode. A few questions: What is 'Bulb Mode?' Why is it called 'Bulb Mode?' What is 'Bulb Mode used for?