
This item is no longer available.
Review Summary
A high quality diffraction limited IR Cut Energy Rejection Filter (ERF) with 100 mm aperture. For use with H-alpha solar filters.
For experienced self builders of solar telescopes, Lunt offer these unmounted Energy Rejection Filter of 40 up to 100 mm aperture. All Lunt ERF filters are unmounted. Lunt Solar Systems offer an optional adaption to your telescope via a custom-made adapter.