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The purple filter is for observing Venus. It makes the dark clouds in Venus’ atmosphere more easily visible. It also accentuates the structures in Saturn’s rings. This filter is useful for observing Mercury in good visibility with large apertures.
Further properties:
- Manufactured from high-quality optical glass
- Filter surface is plane parallel, polished and anti-glare coated
- Double-sided filter threads (internal/external): Multiple filters can be used simultaneously
The filter comes in a practical dust-proof case.
