Red #23A colour filter (25% opacity):Use colour filters to highlight low-contrast details of solar system objects (Sun, Moon, planets). The principle of color filters is that they transmit light in the same or similar color ranges as their own color to a greater extent than in the complementary color range.
For example, the complementary colour of red is blue, the complementary colour of red is green, and the complementary colour of yellow is purple. As the color filter darkens the complementary color, it causes a contrast enhancing effect.
Our colour filters are 1.25" in size, have a high quality glass material and anti-reflective coatings to ensure excellent image quality. It is very important to choose a filter for the object you are observing and the diameter of the telescope. Darker, smaller filters can only be used effectively with larger diameter binoculars.
A red colour filter, darker than an orange filter, will produce a more red-shifted image. Recommended for telescopes with a diameter of about 13-15 cm. It has a similar effect to the orange filter: it is suitable for detecting Mercury, Venus, Mars, Saturn and the Moon. It darkens the bluish sky during daytime observations.