The choice of Leica lens is not the same. The bigger the aperture, the better.

Under the same conditions, the larger the aperture of any lens, the higher the grade, and the larger the aperture means the higher the technical requirements and optical materials. However, a large aperture only represents a grade, which does not mean that the optical quality of a large aperture lens is necessarily better than that of a small aperture lens. For example, M35/ 1.4 in F2 is slightly inferior to M35/2A. This is because the optical structures of large aperture lenses and small aperture lenses are often different, so the imaging is naturally different. The advantage of a large aperture is that it is one step or several steps larger, mainly depending on Jiao Wai's taste and depth of field. Lenses with smaller apertures are more concerned with optical quality and resolution, such as Leica 50/0.9, M50/ 1, or M50/ 1.4. If we only pursue optical quality, it will be directly dropped by M50/2AA.