Purtroppo, questa descrizione non è stato tradotto in italiano, in modo da trovare a questo punto una descrizione inglese.
Blue and blue-green light is blocked. Contrast between dark and lighter zones increases dramatically. This is very helpful when observing Jupiter and Saturn. On Mars, for observing the polar caps.
- 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.