Sorry it took so long to get back on this… we’ve been busy with very many things.
Yes! The Foveon sensor is certainly the selling point on the Sigma. It performs very well in certain circumstances – especially the colour on wildlife in strong light – like this squirrel, on which I actually did very little post-processing. I don’t really feel qualified to write much about it, however, since I’m using a Camera from about seven years ago. Sadly, however, the Sigma that I’m using doesn’t perform well indoors or on sunrises and sunsets.
As for comparing with Nikons and Canons, I am not actually a Sigma user by choice – it’s a pass down camera since my father and sibblings got Nikons. At some point if I start doing more serious photography I’ll need something somewhat newer that can perform better in adverse lighting conditions and on spectacular landscapes. Recently I’ve actually been favouring Pentax because, like Sigma, most of them have in-body vibration reduction, reducing the cost of lenses.
Like I said, there’s actually very little post-processing on this picture, and actually, I only used Shotwell to resize the photo for posting; the actual processing is done in Lightroom on Mac. I never have tried Darktable, but I have used RawTherapee, another similar program to Lightroom. Thanks for the suggestion – I’ll have to try it sometime!