Tokina AT-X 11-20mm F2.8 PRO DX
This lens should be compatible with our filter system and after some testing we have found that in many cases our 100mm or SW150 systems fit without an issue.
However, due to feedback from a number of customers worldwide who have experienced problems in fitting rings (specifically wide angle) to these lenses we have had no choice but to list the lenses as not compatible.
We believe that the main issue is caused by the thickness of the lens’s front filter mount; which does not allow the wide angle ring to screw into place. At this time we do not know if there is a tolerance or a variation in design that has caused this confusion but we would suggest checking a ring on your particular lens before purchase if this is possible.