L.J. Star MetaClamp vs. Competitor
View Diameter Comparison
Even though the glass diameter is smaller, the L.J. Star MetaClamp provides a larger viewing angle since the viewing plane is much closer to the vessel. In other words, viewing through a tunnel limits viewing angle.
Above example compares a 2" sanitary clamp sight window drawn to scale. The result is a 43% greater viewing angle with the L.J. Star MetaClamp.