A high quality T-Ring vital to ensure the film plane
is square to the optical axis.  These T-rinsg accomplish that while
minimizing any flexure as all components are crafted to Vixen's High
Standards.  To be used for Astrophotography in conjunction with other
prime focus or eyepiece projection adapters.

EachT-Ring is designed for eyepiece projection or Prime Focus Photography.

Weight: 1 Ounce, unboxed 4 x 3.5 x 1 inches