Originally Posted by lazyMaks
Maybe someone from the owners of the new 2720MDP (without Backlight setting in OSD) has a calibration equipment and can measure the change of contrast level with a decrease in brightness?
I have a colorimeter (i1 display pro) and a revised 2720MDP. Decreasing the brightness affected the brightness, black level and slightly affected the gamma when lowering it. Contrast remained stable, around 850-950:1 across all ranges of brightness. I used HCFR to play around with the settings to try and achieve the best results with the OSD before profiling.
Increasing the contrast in the OSD raised the contrast to around 1050:1 but caused bleaching and greatly reduced the gamma. Decreasing the contrast raised the gamma to around 2.22 with a contrast setting of 40, but reduced the contrast to around 500:1, which looks horrible. After calibration the contrast was 850:1 @120cdm/2 (Gamma 2.22, colour temperature 6500k).