How can I blur the background of my photos using a Limux GH4 with a 14-140 lens without using photoshop?

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A mode, lowest ISO, lens to 140mm, lowest available f/number (at 140mm). Position subject as far away from the background as possible. Position the camera as near as possible to the subject....Show more

Use the lowest f-stop number (need to be in manual or aperture priority mode).

Use the longest focal length possible for your shoot.

Have the subject close to the camera. If shooting people, your minimum distance should be in the 5 to 10 foot range.

Have the background as far away as possible....Show more

I'd suggest you look up, "Depth-of-Field," and read carefully....Show more