Thank you for this comparison. Bookmarked.
Someone put this on a RED Weapon please.
As resolution and dynamic range increase, this lens will have more utility... IF it's sharp enough.
How did GL Optics make these lenses parfocal?
Did they add action to an element (usually rear) that is stationary in the original construction?
Updated Clouzot's tech here:
Curious how GL Optics determines the T stops for their rehoused lenses...
For instance, DXOmark measured the T stop of the Sigma 50mm 1.4 Art as T1.8 (T1.7 in Nikon for some reason), but GL lists their rehoused Sigma 50mm Art as T1.6.
That said, the rehoused Sigmas are a much better deal (how much is a 330º focus throw worth?).