On a 20 secs exposure at 400 ISO, I ended up with some grain but also very bright sparks randomly colored. Is this normal?
Now, I just saw that there some options turned on (to reduce the noise actually) in the setup of my Canon camera, would that happen to be the reason why I get these colored dots?
Long exposure noise reduction 1:Auto
High ISO speed noise reduction 1:On
Highlight tone priority 0isable