Indeed @Terry. At 55mm the widest aperture is f5.6 for this lens.
Yesterday I went for a walk with my camera with the goal to take the sharpest pictures. I put the camera in Aperture mode and took the shots at f9 - f11, shutter speeds over 1/800, to be sure that it is enough (and the corresponding ISO for good exposure). I thought that this is all it takes to have focused pictures from foreground to background. However I was surprised when I saw these two pictures on my computer (again jpegs are from the camera, without any overcooked processing by myself 
):
1/1000, f/11.0, 55mm, ISO 800, focus distance: 1m
The first was focused on top of the metal rail, right at the slit, a distance of about 1 m away from the point I was standing. Some time ago I was reading on the hyperfocal distance, and I read somewhere about the technique of focusing a few meters in front of me, like a rough guide without calculating anything. And that it enough. Apparently is not!
1/800, f/11.0, 55mm, ISO 800, , focus distance: 200+m
The second one was focused at the rocks of the sea wall and is much more clearer.
At 55mm, f/11.0 the hyperfocal distance is 14.23m! while the near limit is 7.12m! So my focusing at 1-1.5m was way wrong for a focused and sharp picture.
Regarding DoF while focusing in 1.5m distance, at 55mm, f/11 is 0.31m in total, from 1.36 to 1.67! I would never thought that this was possible with f/11!!!
By the way, the exif data regarding the focus distance is not accurate.
So now I understand why some or many photos I take are looking somewhat blurry.
Apparently my technique is the main culprit (perhaps the only one given the limits of my equipment), or more precisely my lack of good understanding of the camera. I’m not complaining though, the fact that needs more work and studying to capture what you want was the main reason I bought this one over a point and shoot camera.