Please refer to the link below Baader Contrast Booster 1.25" Filter for replacement.
Made by Baader
This is our newest high quality filter that eliminates most color aberration inherent in achromatic refractor telescopes. The filter also reduces your view of the blue hue around lunar and planetary subjects. Features multi-layer coatings for 95% transmission.
|Name||Celestron - Contrast Booster Filter - 1.25"|