I've just figured out what the slider does (Sigma's Help entry tells us nothing).
For info, please see my post over on DPR:
SD1 Merrill Highlight Correction SPP 5.5.3: Sigma Camera Talk Forum: Digital Photography Review
Ted
For info, please see my post over on DPR:
SD1 Merrill Highlight Correction SPP 5.5.3: Sigma Camera Talk Forum: Digital Photography Review
Ted