@CarlosM

Are you confusing T stops with F stops?

T is a tranmission value, which is measured and can vary from sample to sample and with age etc.

F is a mathematical expression of the relationship between the diameter mechanical aperture and the focal length.

In short, it's more likely that a lens is wrongly marked as say T1.5 than wrongly marked as F1.4.

This may be pedantic, but for film makers the difference is important. I can't imagine Samyang knowingly sell f2.0 lenses at f1.4's. I would be very interested if you could provide the link to the review.

Are you confusing T stops with F stops?

T is a tranmission value, which is measured and can vary from sample to sample and with age etc.

F is a mathematical expression of the relationship between the diameter mechanical aperture and the focal length.

In short, it's more likely that a lens is wrongly marked as say T1.5 than wrongly marked as F1.4.

This may be pedantic, but for film makers the difference is important. I can't imagine Samyang knowingly sell f2.0 lenses at f1.4's. I would be very interested if you could provide the link to the review.