Simera 21mm f/1.4 brings the wide-angle perspective into the Simera series, combining an expansive field of view with careful optical refinement. Its optical formula includes 2 aspherical, 3 high-refractive index, and 3 extra-low dispersion elements that work together to suppress chromatic aberration and distortion across the frame, ensuring sharp, true-to-life rendering from edge to edge..