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Amazon.com : Astromania 1.25" Color/Planetary Filter - #80A Blue : Electronics
Choosing a Color/Planetary Filter
1.25 Inch 4pcs Color Filter Set for Telescope Eyepiece - No.12 Yellow, No.23 Red, No.80A Blue and No.56 Gree - AliExpress
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Amazon.com : Astromania 2" Color/Planetary Filter for Telescope - #80A Blue : Electronics
Lumicon 2 Inch #80A Light Blue Color Filter - Camera Concepts & Telescope Solutions
Lumicon 1.25 Inch #80A Blue Color Filter - Camera Concepts & Telescope Solutions
USING FILTERS FOR LUNAR/PLANETARY OBSERVATION — Alpine Astronomical LLC
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Telescope Accessory Kit #80a Blue #25 Red Crystalview Moon 1.25" Color/planetary Filter 2x Barlow Lens Omni 6mm 15mm Eyepiece - Telescope - AliExpress
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Agena 2" Color / Planetary Filter - #80A Medium Blue
