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Superbly machined product, with unsurpassed optics. I get about two times the contrast with this wedge than with the Baader Astro solar film on the same instrument. Most of the IR is removed by either the ND filter coatings or coatings on the wedge, but still you will want an IR blocker. The difference is about 2x exposure when you add an addition IR blocker because it removes the unwanted IR. Anyway, the continuum filter which is included wont work without an IR blocker. Worth the long wait. see my solar images at schursastrophotography.com