Product information "KaseFilters K170 filter holder for Tamron and Pentax 15-30mm 2.8 (G1 and G2)"
For the Tamron SP 15-30mm F / 2.8 Di VC USD lens (also suitable for the new G2 version of the Tamron 15-30mm 2.8 and for the Pentax 15-30mm 2.8 lens) with arched front element and integrated Gegenlichblende we have specially developed a filter holder for our 170mm filter system that can accommodate a 150mm round polarizing filter. The filter holder can accommodate a 150mm round filter in the default configuration. It can be installed additionally stops filter rails for the use of 170x170mm or 170x190mm rectangular filters. As the material is CNC machined 6063 aluminum used, which suppresses by its matt-black finish light reflections within the Filterhaters. P>