Sonnenfilter QUARK H-Alpha, Protuberanzen

The H-alpha eyepiece with mirror star diagonal looks like this. The QUARK is not much larger, or heavier, than a normal eyepiece.

Example image 2

Example image 1

The optical design of the QUARK H-alpha attachment with blocking filter, telecentric Barlow lens and etalon filter.

Simply plug QUARK into your refractor's star diagonal in the same way as for an eyepiece. You can then plug an eyepiece of your choice into the QUARK itself. A UV/IR energy rejection filter is recommended for protection when using refractors of over 80mm in aperture.