Celestron UV/IR Cut-off Filter - 1.25 in

SKU: #94125 $78.99

The ultimate UV and Infrared blocker, featuring hard Ionbeam coatings, and fine optically polished glass! The ideal filter

Celestron Oxygen III Narrowband Filter - 2 in

SKU: #93624 $144.95

The 2-inch OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by

Celestron Oxygen III Narrowband Filter - 1.25 in

SKU: #93623 $109.95

The 1-1/4-inch OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted