Any really clever camera people out there?

I'm looking to buy a really good camera - what type do I need to buy which allows me to take photos in which the foreground is focused and the background is blurred? Or can you do this with ordinary digital cameras? (and I don't mean with photo editing programs) And what is the technical term for this, so I... show more I'm looking to buy a really good camera - what type do I need to buy which allows me to take photos in which the foreground is focused and the background is blurred?

Or can you do this with ordinary digital cameras? (and I don't mean with photo editing programs)

And what is the technical term for this, so I can explain it to the other really clever camera people in the shop without sounding like a pleb?

Thank you.
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