K. Shwayyea, A. and Hasan, A.B. 2022. Simulation and Evaluation of a Variable Effective Focal Length of Refractive Binocular Telescope. Ibn AL-Haitham Journal For Pure and Applied Sciences. 35, 3 (Jul. 2022), 65–75. DOI:https://doi.org/10.30526/35.3.2857.