William Optics Dielectric Mirror Only

You want a top-quality DIELECTRIC mirror for your WO-enhanced or silver diagonal? Once more William Optics has the answer for you: no need to spend more money on a new diagonal you do not need or go the cheap shortcut with disastrous results. Purchase a real dielectric mirror which will last for all your life.

This is the exact same mirror that is used in our renowned diagonals and is an exclusive product from WO: we do not sell this mirror to any other manufacturer. There are many "dielectric" mirrors on the market, the difference is the quality of the coating and number of layers, and especially the accuracy of the polishing.