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Rokinon introduces two new fast full-frame prime lenses for Canon EF
http://www.imaging-resource.com/news/2017/01/28/rokinon-introduces-two-new-fast-full-frame-prime-lenses-for-canon-ef
http://www.thephoblographer.com/2017/01/28/rokinon-sp-lenses/ -
Irix 15mm f/2.4 is an Ultra-Wide Lens for Canon, Nikon, and Pentax
https://petapixel.com/2016/03/19/iris-15mm-f2-4-ultra-wide-lens-canon-nikon-pentax -
Voigtlander Color Skopar 20mm f/3.5 (discontinued)
http://www.kenrockwell.com/voigtlander/20mm-f35.htm -
Laowa 12mm f/2.8 Zero-D
http://www.venuslens.net/product/laowa-12mm-f2-8-zero-d/ -
Yongnuo Canon 50mm f/1.4 and Yongnuo 35mm f/2 for Canon EF
https://petapixel.com/2014/09/25/yongnuo-50mm-f1-4-looks-like-near-perfect-clone-canon-50mm-f1-4/
https://petapixel.com/2015/06/05/testing-the-image-quality-of-the-yongnuo-35mm-f2-for-canon-ef/