Sensor Question

[KY1977]

Hi

I just realized that the images taken by my camera camera shows bright spots (all sorts of colours) when I shoot in bulb mode (~60sec) at night. To confirm, I shot with the lens cover on (with the same settings) and see the same spots again. Are these spots call dead pixels on my sensors?

Cheers

 

[Zeddy]

It's long exposure noise. When the sensor is active, it's being heated up. And it will produce the noise.

 

[KY1977]

It's long exposure noise. When the sensor is active, it's being heated up. And it will produce the noise.

But there are only a few spots, not covering the whole image.

 

[icebox]

Hot pixels. http://www.kenrockwell.com/tech/hot-pixels/index.htm
Comes with long exposure, which heats up the sensor.