For the optical design result of a certain space camera, several frameworks in different structural forms are designed and selected according to the machining features of different materials. The resonant frequency of each framework is analyzed by using a finite element method and the economics of each framework is also analyzed. Finally, the structural form is determined for the framework. The selected framework structure is a full-truss one. It has a weight of 57 kg and a first-order resonance frequency of 90.4 Hz. The mechanical test of the framework components shows that the framework has its first-order resonance frequency of 88.7 Hz. The analysis and test results show that it meets the design requirement.