Introduction
The Tokina Opera 50mm F1.4 FF is a new fast standard prime lens for full-frame DSLR cameras from Canon and Nikon.
Designed to be the ultimate “fast 50”, the Tokina Opera 50mm F1.4 FF is comprised of 15 elements in 9 groups, including 3 lens elements molded from SD (Super-low Dispersion) glass and one aspherical glass element.
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https://www.photographyblog.com/reviews/tokina_opera_50mm_f1_4_ff_review
