>>3804193You can look it up yourself, but have this blogpost.
http://www.sassmannshausen.eu/2015/05/05/the-big-color-discussion/There's also interviews with the Phase One guy explaining it, and other sources around. It's not really a secret. Basically the color filter was weakened so that more light makes it to the photosite, but weaker colors are the tradeoff to do that.
>>3804180I saved it from here but you can find more looking for Sigma Merrill on flickr.