1.25″ Red Filter

• A red filter helps to red

• A red filter helps to reduce glare.
• This really helps observations of Mercury in the twilight when the planet is low down.
• If observing the inferior planets during daytime this filter helps to reduce the brightness of the daytime sky, increasing the contrast.
• Used on Mars it gives great definition between the dark and bright surface features and polar caps.
• This filter gives great contrast between Jupiter’s dark belts and brighter zones.
• One disadvantage is that the low light transmission of this filter means that it can only really be used with larger telescopes.