In imaging apparatus (200) and method in which the focus of the imaging apparatus (200) can be adjusted, the system includes at least one member (46); at least one imaging assembly (200) movably attached to said member (46); said at least one imaging assembly (200) comprising at least one lens (260) and at least one photosensor (280); wherein said imaging assembly (200) includes at least a first condition and a second condition; wherein, in said first condition: - said lens (260) is in imaging relationship with at least a first of said plurality objects (30); - said lens (260) is located at a first distance from said at least a first of said plurality objects (30); and - said imaging assembly (200) is located at a first position relative to said member (46); wherein, in said second condition:- said lens (260) is in imaging relationship with at least a second of said plurality of objects (30);- said lens (260) is located at said first distance from said at least a second of said plurality of objects (30);- said imaging assembly (200) is located at a second position relative to said member (46); and wherein said second position is different from said first position.