There has to be a gotcha somewhere... these lenses look (lack of AF notwithstanding) too good for the size and extreme specs. Something doesn't add up yet. 
(just like both 16mm pancakes - from Sony and Samsung - having serious issues stemming from their tiny size and fast apertures).
(just like both 16mm pancakes - from Sony and Samsung - having serious issues stemming from their tiny size and fast apertures).