1. The problem statement, all variables and given/known data See the image I uploaded. 2. Relevant equations Paraxial approximations 3. The attempt at a solution I think the image is formed after the ocular, and I understand the system is afocal. The magnification is also less than 1, but the angular magnification is >1. What I am stuck on, is the telecentricity. How am I to ray-trace the aperture so I get an entrance and exit pupil? What is F2? I tried ray-tracing the plane mirror in the middle, but I ended up with its image being formed somewhere besides the ocular. Help!!