Phase Contrast Centering Telescope - 30mm Diameter

This phase centering telescope has a 30mm O.D. and will mount into any eyetube that has a 30mm diameter. It is fully focusable. 

• The centering telescope facilitates the alignment of the phase contrast annuli in the phase contrast turrets and sliders with the phase rings in the phase contrast objectives
• Inserts into eyetubes with 30.1mm I.D. (must first remove an eyepiece)