This article describes some simple experiments I performed to help me understand the tonal treatment of several raw image converters. The camera was a Canon 1D, and the converters were Canon's Raw Image Converter (RIC) and PhaseOne's CaptureOne DSLR (C1). After I began the study Adobe released the Camera Raw (CR) converter so I added some comparisions for this new converter.

	Introduction - Paying attention to tonality. (more)
	Methodology - Test setup and description of the experiment. (more)
	Unadjusted Output - The actual unadjusted grey scale images produced by the various converters. (more)
	Histograms - These are the histograms of the unadjusted output of the various converters as displayed by Photoshop. (more)
	Conversion Curves - The deduced conversion TRCs for the three converters. (more)
	Adjusting to original - The curves required to adjust the image to true (original) tonal values. (more)
	Difference Curves - Although I'm not sure why you'd want to do it, these are the curves required to convert from one converter's tonality to anothers. (more)
	C1 'linear' curve - In addition to a 'film standard' curve and 'extra shadow' curve, C1 also provides a 'linear' curve. (more)
	Camera Raw Ess Curve - A deeper examination of CR's contrast setting and its effect on the TRC. (more)
	CR custom attempt (more)
	Conclusions - Well, you can draw your own but here's mine: (more)
	App: DPP default TRC - DPP allows variations of the TRC. When I get time I'll post plots of these.