At this time, the only official UNISTELLAR filter available is the Smart Solar Filter: A New Space Experience: the UNISTELLAR Smart Solar Filter.
Installing a third-party filter on the EXPERT Range (EQUINOX and EVSCOPE) is possible. However, please keep in mind that using filters troubles the collimation. Adding a filter to your camera is at your own risk. In case of damage or if you used a filter and we discover your fingerprints on the camera upon inspection, our warranty will not cover your unit. Our Customer Care Team is not trained to use those filters, so we are unable to support you if you choose to use them.
Installing a 3rd party filter on the ODYSSEY and ODYSSEY PRO is not possible.
Please keep in mind that we do not test third-party filters with our image processing algorithms, and you may experience unexpected behavior when you observe with them.