(a) Axial (Z) extent of 3D OTF support in the plane for (red) and (green). (b) 1D illustration showing the frequency range over which information is included from the zero (red) and first order (green) passbands in the Max kz reconstruction scheme. (c) Weighted combination of information from zero (red) and first order (green) passbands in the WLR method. (d) Boundary of OTF support with 3 orientations of when is equal to half the incoherent cutoff frequency. (e) Combination of the zero and first order passbands which maximises the axial support of the OTF for all spatial frequencies. (f) Combination of the zero and first order passbands in the Max kz method. (g) Weighted combination of zero and first order passbands in the WLR method. For clarity, only the weighting for each (red) and a single weighting for (green) are shown.