| Abstract: | Photography of models and modulation transfer function analysis have been used to investigate the common belief that in aerial photography large-scale images are preferable to small-scale images, even when the resolving power in terms of ground dimensions is the same. The belief was found to be justified for two extreme cases representing, respectively, a small scale, mainly grain-limited system, and a large scale, wholly lens-limited system, for which the ground resolutions were equal on three-bar targets of 3 to 1 contrast (modulation 0–5). Resolving power tests would have been misleading for these two systems even at a target contrast of less than 2 to 1 (modulation less than 0–3). |
