How to stack focus so that both the background and the subject are sharp?

Question

I would like to take a portrait with a 50mm lens, where both the subject and the background are sharp. The usual way to do this would be to either switch to a wide-angle lens or to dial-down the aperture, but I'm wondering if this is possible with focus stacking? The approximate workflow would look like this:

Take a picture of the person from a tripod
Have the person quickly step out of the frame
Take a picture of the background
Merge the photos in post-processing - how to do this?

I'm looking for a way to do step 4 automatically, rather than through painstaking post-processing work in Photoshop. I presume this should be possible with modern software.

How "Automatic" are you seeking? "Select both images and click one button" automatic, or "layer the photos and use a few tools with a few minutes of cleanup" kind of 'automatic'? — TheLuckless, Apr 25 '19 at 18:29
Possible answer here. Although some cameras can also do it automatically, too... — twalberg, Apr 25 '19 at 18:48

score 3 · Accepted Answer · answered Apr 26 '19 at 05:48

Adobe had a good blog which shows how to do this in Photoshop here.

Basically:

take multiple photos with different areas in focus
import photos as layers to one image
auto align layers
auto blend layers
adjust masks, tone, color, etc to your liking.

How to stack focus so that both the background and the subject are sharp?

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