PENTAX Eyepieces - Glass

_{Last Updated: Wed Apr 15 09:14:02 -0400 2009}

Q: What type of glass is used in PENTAX eyepieces?

A: PENTAX eyepieces feature rare-earth lanthanum crown glass for premium quality and outstanding optical performance .

This glass type features a high refractive index and extra-low dispersion for maximum light transmission and superb optical clarity.

_{Tags:
Eyepiece}