Hi estherau - the second of your two screen captures above shows the Gamma In and Gamma Out settings that bagginsbill is referring to in his note, I think. If you are using PPro gamma correction (in your render settings) then these two values need to be set to 1.0, not 2.2.

:O)

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)