JMI Telescopes 2" Enhanced Extension Tube (2.13")

The JMI Telescopes 2" Enhanced Extension Tube adds 2.13" (~54mm) of optical path length to your telescope combination, and is useful for retaining the optical path length when replacing a star diagonal or a prism with a shorter accessory, such as a photo adapter.  It may also come in handy when converting to a JMI focuser, which are so low profile that they often move the focus point too far inward.  JMI Extension Tubes also reduce minimum focusing distances, allowing closer observations of subjects when focus is moved out by eyepiece projection, use of a Barlow lens, etc.