Filter #25 red: The filter has a positive effect on the contrast of the image and is recommended for observing Mars, Jupiter and Saturn. It is characterised by low light transmission, so it is only effective with telescopes with an aperture of 150 mm or more. With this filter, you can see the polar caps, dust clouds and seas on Mars, as well as the blue clouds of Saturn and Jupiter in detail.
The Moon filter greatly increases contrast when observing the Moon. Harsh moonlight is softened so that structures can be more easily identified. This can also provide better separation of components when observing binary stars if they have considerably different magnitudes.
