Off-axis paraboloids provide sophisticated challenges in both machining and measuring. There are 2 accepted approaches for manufacturing off-axis paraboloids. In method one, a rotationally symmetrical part is shaped and polished with subsequent separating the off-axis elements from the block. On the other hand, one can machine the single parts right from the start. In this case the surface is kind of free-form. In this paper we report on the manufacturing of mirrors for both methods. Special attention is paid to machining and measuring. The fabrication process consists of iteration steps. The polishing step can remove the remaining shape error of the mirror surface itself or the wave front of the system.© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.