Engineering Physics Annotation << Back Determination of the Maximum Achievable Aberration Correction of Optical Systems of Varying Complexity Bezdidko S.N. At the initial stages of designing new optical systems, it is necessary to design the starting optical system based on the requirements of the technical specifi cations. In most cases, lens designer only can choose the starting optical system from previously developed systems or from patent information. In this case, the most important task is to study the correction capabilities of various types of optical systems and select the most suitable system options for further design. In this regard, one of the most important practical tasks is the task of selecting the starting optical systems that are most appropriate for use at the values of aperture ratio and angular fi eld of view specifi ed in the technical specifi cations, as well as assessing the limiting values of aperture ratio and angular fi eld of view for each optical scheme under consideration. These problems have not received suffi cient coverage in the literature, and it is the use of orthogonal aberrations and new approaches to analyzing the aberration properties of optical systems that make it possible to successfully solve such problems. Keywords: design of optical systems, theory of aberrations, higher order aberrations, orthogonal aberrations, synthesis, optimization, databases of optical systems. DOI: 10.25791/infi zik.8.2024.1420 Pp. 29-49.