Lumicon 2 Inch #80A Light Blue Color Filter - Camera Concepts & Telescope Solutions
Telescope Filters Guide: All You Need To Know
0.965 Inch Telescope Eyepiece Color Filter For Moon Lunar Planet Nebula # 80a - Decorative Telescopes - AliExpress
Amazon.com : Astromania 1.25" Multiple 5-Position Filter Wheel for Telescope - with 1.25-Inch Four Color Filters(#15 Deep Yellow, 25 Red, 58A Green and # 80A Medium Blue) : Electronics
Choosing a Color/Planetary Filter
Telescope Accessory Kit #80a Blue #25 Red Crystalview Moon 1.25" Color/planetary Filter 2x Barlow Lens Omni 6mm 15mm Eyepiece - Telescope - AliExpress
Amazon.com: Alstar 1.25" Color/Planetary Filter - #80A Blue : Electronics