The following images were taken using manual focus ranging from the smallest possible (10cm) to the largest possible (infinity). The large depth of field was achieved by using small aperture (f8.0).
MF 10cm, 1/15, f8.0
MF 20cm, 1/15, f8.0
MF 50cm, 1/15, f8.0
MF 1m, 1/15, f8.0
MF 2m, 1/15, f8.0
MF <5m, 1/15, f8.0
MF >5m, 1/15, f8.0
MF infinity, 1/15, f8.0