A camera mimics the biological vision system for acquiring natural scenes. Human beings and other animals are mostly equipped with binocular stereo or multi-eye vision systems for high-fidelity scene acquisition, which motivates us to develop a multi-camera system to enhance the imaging capacity. Multi-dimensional and multi-scale image/video acquisitions can be realized via heterogeneous sensors and shooting conditions of different cameras, and then leveraging matches across cameras to realize computational multiscale feature fusion for final enhanced reconstruction in respect of scale or dimensionality. In this article, we exemplify the multi-camera system in the applications of wide-field ultrahigh-definition imaging, high spatiotemporal video acquisition, high dynamic-range and low-light imaging enhancement to demonstrate its advantages in improving the imaging capacity, e.g., increasing imaging spatiotemporal resolution, expanding the field of view and extending imaging dynamic range.