Levenhuk 1.25" Optical Filter #23A (Light-red)
It is recommended for apertures from 130mm. The filter is used for the detailed study of Mars and the Moon as well as atmospheric phenomena on Saturn and Jupiter. It can be used for twilight observations of Mercury and daytime observations of Venus. Comet tails are clearly distinguishable through this filter.

Levenhuk 1.25" Optical Filter #25 (Red)
The filter for telescopes with an aperture from 150mm. It is an excellent choice for observing the polar caps, seas, and dust clouds on Mars as well as observing clouds on Jupiter and Saturn. The filter can also be used for observing the Moon.

Levenhuk 1.25" Optical Filter #56A (Light-green)
This filter is extremely useful filter for observing Jupiter. It emphasizes the details of the Great Red Spot as well as many subtle atmospheric formations that are hardly visible. It can be used for observing Saturn and Venus. The filter does well when studying the Moon. It is compatible with low aperture telescopes; it partially eliminates chromatic distortions on refractors.

Levenhuk 1.25" Optical Filter #80A (Blue)
It is one of the most popular filters for studying the planets of the solar system. It allows you to observe in detail the Great Red Spot on Jupiter and the details at the poles of Saturn. The filter is also widely used for observing the Moon, Mars, Venus, and Mercury.