n-Beam lattice images. VI. Degradation of image resolution by a combination of incident-beam divergence and spherical aberration

Lattice images were computed with increasing incident-beam divergence with spherical aberration taken into account. The effect is as if the outer diffracted beams transmitted by the objective aperture do not contribute to the image, so that the resolution is effectively less than that expected from the aperture size. Images of Nb₁₂O₂₉, calculated with the inclusion of this effect, show improved agreement with experimental images.