The 7Artisans M50mm F1.1 lens features an optical system consisting of 7 elements in 6 groups, based on the Sonnar formula. It includes two high refraction optical elements with an index of 1.9 to enhance picture quality and lens portability. Our research and development process involved analyzing field curvature and the influence of image astigmatism on out-of-focus areas. Numerous corrections and improvements were made, resulting in higher image quality. Using the lens wide open at an aperture of F/1.1 delivers soft and pleasant bokeh. When stopped down to F1.4, sharpness is improved while maintaining smooth out-of-focus areas. Repetitive corrections of spherical and chromatic aberration lead to precisely controlled bokeh shape, along with good contrast and sharpness in the focus area of this large aperture lens.