The 1.25" Eyepiece Filter Set from Celestron contains four assorted filters mounted in black anodized aluminum cells, packed in a plastic case. All four eyepiece filters are threaded to fit most 1.25" eyepieces and accessories. The cells of each filter are double-threaded so that they can be stacked in different combinations. They offer a full 26 mm clear aperture. This filter set includes: ND-96-0.3 Neutral Density, #12 Deep Yellow, #21 Orange, and #80A Blue filters.
Celestron's filters are made of solid plane parallel glass with an anti-reflection coating to help prevent glare and aberrations. Not only are these highly useful filters and combinations, but they also provide an economical way to add versatility to your filter collection.
#12 Deep Yellow
ND-96-0.3 Neutral Density Filter, 50% Transmission