Cassini Four Slot Filter Wheel

Normally to use filters with your telescope you would have to thread the filters on and off of your eyepieces as you are use them. With the Cassini 4 Slot Filter Wheel, you simply insert three astronomical color filters of your choice (Filters Sold Separately), leaving the fourth slot empty for non-filtered viewing, insert your eyepiece, and then to switch filters, just rotate the dial on the Cassini 4 Slot Filter Wheel.