Depth of field is dependent on both focal length and aperture. Wide angle lenses will have a greater depth of field than long lenses and as noted, smaller apertures means greater depth of field and of course, longer exposures.
The overall depth of field extends around two thirds of the distance beyond the focal point and one third of the distance towards the camera. In other words, if you wanted to include three objects that were positioned as shown below-
2m away---------------------------------2.33m away------------------------------------------------------------------3m away
You would focus on the object 2.33m away and providing that your aperture was set accordingly, you would get all three objects in focus. If the aperture was too large, then you could focus on the object 2.33m away, but the depth of field might only extend 24cm beyond the object and 12cm towards the camera.
In this case, if you focussed on the most distant object- 3m away, then your overall depth of field to get all three objects in focus would need to be 3m- 1m towards the camera and 2m beyond the object.
Depth of field is also affected by the distance between the object and the camera. With identical settings on the camera, you will get a shallower depth of field if the object is closer to the camera. This is why macro photography has a very limited depth of field. For static subjects like your Samsung product, you can mount the camera on a tripod, close down the aperture and take a long exposure, but for living subjects, such as bees or butterflies, you are going to have to be fast, and that means wide open apertures and shallow depth of field.
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