Black nylon plastic with a matte finish and slight grainy feel.
About this Product
This eyepiece is a prism-mount, designed for the NeoLucida project. It is intended for use with the 5x5x10mm mirrored prisms in the NeoLucida DIY Prism Kit. This model is intended for persons who prefer their viewport to the LEFT of their mounting clamp. You should also purchase the Eyepiece Endcap; please see http://shpws.me/pXuy.