A camera module comprising: a digital image sensor; and a camera lens arrangement which comprises a discretely adjustable focusing lens (100, 300, 604), wherein the lens comprises: - a lens chamber (101, 501) defining a light path and having at least one lens face (105, 155) having an optical power arranged along that light path; - a storage chamber in the form of a conduit having two ends that is fluidly connected with the lens chamber, such that the lens chamber and the storage chamber together form a closed system, with the lens chamber fluidly connected via two openings of the lens chamber to the storage chamber; - a fluid system residing in said chambers and including a first fluid, having a first index of refraction, and a second fluid, having a second index of refraction that is different from the first index of refraction, said fluids furthermore being immiscible and exhibiting different forces of attraction to electric fields; and - a fluid system switch comprising electrodes (108, 112, 130), operative to rearrange the fluid system between a first discrete state and second discrete state by means of electrostatic forces, such that the first and second fluids flow in a circulatory manner, wherein, in the first discrete state, the at least one lens face (105, 155) is substantially covered by the first fluid whereas the second fluid is mainly contained in the storage chamber, and, in the second discrete state, the at least one lens face (105, 155) is substantially covered by the second fluid whereas the first fluid is mainly contained in the storage chamber, and wherein the lens functionality is provided at the interface between said at least one lens face (105,155) and either one of the first fluid or second fluid, characterised in that the index of refraction of one of the first and second fluids is the same as the material of the lens face, such that one of the discrete states is an optically passive state and the other of the discrete states is an optically active state. a digital image sensor; and a camera lens arrangement which comprises a discretely adjustable focusing lens (100, 300, 604), wherein the lens comprises: - a lens chamber (101, 501) defining a light path and having at least one lens face (105, 155) having an optical power arranged along that light path; - a storage chamber in the form of a conduit having two ends that is fluidly connected with the lens chamber, such that the lens chamber and the storage chamber together form a closed system, with the lens chamber fluidly connected via two openings of the lens chamber to the storage chamber; - a fluid system residing in said chambers and including a first fluid, having a first index of refraction, and a second fluid, having a second index of refraction that is different from the first index of refraction, said fluids furthermore being immiscible and exhibiting different forces of attraction to electric fields; and - a fluid system switch comprising electrodes (108, 112, 130), operative to rearrange the fluid system between a first discrete state and second discrete state by means of electrostatic forces, such that the first and second fluids flow in a circulatory manner, wherein, - a lens chamber (101, 501) defining a light path and having at least one lens face (105, 155) having an optical power arranged along that light path; - a storage chamber in the form of a conduit having two ends that is fluidly connected with the lens chamber, such that the lens chamber and the storage chamber together form a closed system, with the lens chamber fluidly connected via two openings of the lens chamber to the storage chamber; - a fluid system residing in said chambers and including a first fluid, having a first index of refraction, and a second fluid, having a second index of refraction that is different from the first index of refraction, said fluids furthermore being immiscible and exhibiting different forces of attraction to electric fields; and - a fluid system switch comprising electrodes (108, 112, 130), operative to rearrange the fluid system between a first discrete state and second discrete state by means of electrostatic forces, such that the first and second fluids flow in a circulatory manner, wherein, in the first discrete state, the at least one lens face (105, 155) is substantially covered by the first fluid whereas the second fluid is mainly contained in the storage chamber, and, in the second discrete state, the at least one lens face (105, 155) is substantially covered by the second fluid whereas the first fluid is mainly contained in the storage chamber, and wherein the lens functionality is provided at the interface between said at least one lens face (105,155) and either one of the first fluid or second fluid, characterised in that the index of refraction of one of the first and second fluids is the same as the material of the lens face, such that one of the discrete states is an optically passive state and the other of the discrete states is an optically active state.