Quote Originally Posted by batwister View Post
100 for me. Partly due to using the metered prism, which, like me, doesn't believe in 'half measures'. 160 still seems a baffling film rating to me. Strange number.
It is 160, because it reflects the improvements that its predecessor, Vericolour, went through.

Prior to those improvements Vericolour was ASA (not ISO) 125.