|
This image should spark a thread about signal to noise ratio and how much gain extra exposure time will provide.
As I understand it the signal to noise ratio improves to the square root of the increased exposure time. So it must take a LOT more hours to get that last little bit.
Did you find that Rolf with this image? Or did you wait until you had the full 120 hours to process it. I wonder what it looked like at say 40 hours for example.
Greg.
|