Using Bulb for Night Photo
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12-12-12, 02:08 AM
Join Date: Apr 2011
Location: Woburn, MA, USA
Thanks Stephen, you're right. I use a remote release and tend to forget that I am locking it open.
Originally Posted by
Click and it opens, click again and it closes is the T or "Time" setting. Bulb is click and it stays open until you release the button. Hence, locking cable releases are usually used on camera with no T setting. A locking cable release lets you turn a screw to keep the shutter depressed until you unscrew it again.
As exposure is the product of the amount of light you let in (the aperture) and the length of time you let it in for (the shutter speed) holding the shutter open affects the exposure - by definition.
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