Post processing or Sigma "magic"?

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Post processing or Sigma "magic"?
1 week 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.

 OrdinarilyInordinate's gear list:OrdinarilyInordinate's gear list
Nikon D5200 Nikon AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR Nikon AF-S DX Nikkor 35mm f/1.8G Nikon AF-S DX Nikkor 18-200mm f/3.5-5.6G IF-ED VR
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