Colour Name:Purple The filter with the colour purple is for Venus observation. It makes the dark clouds of the Venus atmosphere more visible. It also highlights the structures in the rings of Saturn. With large openings, it is worth using this filter in the planet Mercury. What are colour filters for? Do you even need colour filters? The colour filter darkens the light that arrives at the eye or on the sensor of the camera. This eliminates overradiation. They make the image more contrasting and several details are then visible.
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