Both images used the slightly sharpened Prolost Flat setting that I had settled upon two years ago. (I automatically apply a modest amount of in-camera sharpening as I am a believer in Straight Out Of Camera [SOOC].) Therefore, this suggests that I am still fairly happy with these settings.
Almost all the time I have the colour balance set to Auto White Balance (AWB). This lets the camera adjust the colour balance to suit the lighting conditions, and mostly it seems to do a good job. However, I suspect there may be a tendency to make images more blue and red than I think they are. Fortunately this is not a problem and it can be compensated for. The EOS 100D allows the user to set colour biases for both amber and green (conversely blue and magenta) -- getting the biases looking right is the hard part!
There seems to be no shortcut to finding the ideal settings. I start by adjusting the blue balance with two notches of amber, i.e., A2. Then I take photos on this setting and decide whether the results show too blue or too amber a colour cast. If I am not satisfied, I will make another adjustment and repeat the process until I feel things are looking about right. Then I will go through the same procedure for green... Currently I am using (A4, G4) on the EOS 100D. (Possibly coincidentally, I am using similar AWB settings on my compact Canon PowerShot S95.)Most Canon digital cameras appear to have a Custom White Balance setting. This works well and is easy to use on compact cameras, but is a little awkward and less useful on the EOS 100D. It is necessary to take a photo of a suitable white target in the appropriate lighting conditions, and then go through the menu to select this photo as the WB to use. But by the time this is done, the lighting may have changed! Also, I was surprised to find that the AWB biases still seemed to be having an effect if they were set while using CWB, so perhaps I was not doing it correctly?
