Next Sigma chapter
Sigma A1 test system
http://www.imaging-resource.com/news/2015/05/06/exclusive-sigmas-a1-lens-testing-system-revealed
About Nikon factory
Slightly offtopic, but
Sigma Aizu (chapter 1)
Photos from Sigma factory
http://www.dpreview.com/articles/0773575852/making-art-inside-sigma-s-lens-factory
Fluorite, aspherical and UD lenses in Canon glass
http://cpn.canon-europe.com/content/education/infobank/lenses/fluorite_aspherical_and_ud_lenses.do
EF lenses technologies
Panasonic lenses
Wonderful picture. I really like this topic... well, many of old p-v users know anyway that I am total freak for lenses, LOL
Wonderful story from Sigma. That's great storytelling in film.
Very cool.
Cool video.
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