55mm · f/1.2
The Yashica ML 55mm f/1.2 (also known as the Tomioka Auto Yashinon) is a fast, collectible M42 lens with a distinctive character. Its optical design produces creamy, swirly bokeh and strong central sharpness wide open, but corners are very soft and there is significant spherical aberration. Build quality is solid with smooth focus, though the aperture ring lacks clicks at f/1.8. It suits photographers seeking a unique, vintage look for portraits or low-light work, but not for critical sharpness across the frame.