New answers tagged flash
2
votes
Why is my Nikon D5100's pop-up flash only lighting parts (top/bottom) of the frame?
As xenoid said in their answer, at any shutter speed faster than sync speed there is not a single moment when the full frame is exposed, that's why sync speed is usually the fastest speed for flash to ...
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2
votes
Why is my Nikon D5100's pop-up flash only lighting parts (top/bottom) of the frame?
In a DSLR the shutter is a double curtain. Initially the first curtain covers the sensor. To take a shot, the first curtain is opened, then after the set exposure duration the second curtain follows.
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