In this first image, the f-stop is set to the lowest setting available on an iPhone 12, which is f/1.4. This allows more light into the photo but results in a shallower depth of field, keeping less of the image in focus.
The f-stop is set to f/2.8, which is the default setting on an iPhone. This aperture creates a balance between the subject and the background, keeping the individual in focus while still providing some background detail.
In this final image, the f-stop is set to the highest setting available on an iPhone 12, which is f/16. As a result, the image receives less light, but a greater depth of field keeps more of the scene in focus. The background appears much clearer, making details such as the tunnel and people passing through more visible. This type of photo encourages viewers to explore the entire scene, whereas the previous images draw more attention to the individual subject.
Photographic Journalism 
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