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Vernonscope 1/20th Wave Quartz Star Diagonals

2" Quartz Star Diagonal (photo coming soon)

This diagonal is built in the USA around a quartz flat with silver reflective coating and a protective quartz overcoat. The 2" diagonal will take 2" eyepieces or 1.25" with an adapter.

Mirrors are guaranteed to have interferometry results of at least 1/20th wave PV (peak to Valley measurement).  Each quartz piece has a serial number and comes with an interferogram with the results of the surface testing for the quartz in your diagonal.

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1.25" Quartz Star Diagonal

This diagonal is built in the USA around a quartz flat with silver reflective coating and a protective quartz overcoat.  The 1.25" diagonal will take 1.25" eyepieces.

Mirrors are guarenteed to have interferometry results of at least 1/20th wave PV (Peak to Valley measurement).  Each quartz piece has a serial number.  Each diagonal comes with an interferogram with the results of the surface testing for the quartz in your diagonal.