Post processing or Sigma "magic"?

Started 5 months ago | Discussions thread
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Post processing or Sigma "magic"?
5 months ago

This is probably common knowledge here--I apologize if my question is foolish, but for an outsider who's never used Sigma cameras, I'm curious about the neat three-dimensional blurred effect I'm seeing on photographs made with Sigma DP cameras--almost animated:

Particularly close-up shots with shallow depth of field and the background seems to have a soft glow to it.

Is that post-processing or the actual in-camera effects combined with a lens?

This one looks definitely-post-processed to me, but I can't tell if it was just sharpened and color-corrected or whether other effects were added to create such bokeh and the overall focus-blur effect:

Here's another example:

Just curious if such images can be made with, say, my Nikon DSLR with a lot of post-processing and some Photoshop tweaking or whether it's something that just easily comes out of Sigma cameras.

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