Chinese company NiSi has announced the JetMag Pro Star Soft, a pair of magnetic diffusion filters designed for astrophotography and night landscape work. The filters are available in two formats: the standard 82MAG version, compatible with lenses that accept 82mm front threads, and the larger MAXMAG version, intended for ultra-wide lenses that typically cannot accept conventional front filters.

The optical effect produced by both variants is the same in principle: the filters introduce a controlled degree of diffusion that causes bright stars and other celestial light sources to appear slightly enlarged and surrounded by a soft glow. The underlying image structure is not eliminated — the surrounding sky and landscape detail are intended to remain readable — but the rendering shifts away from the hard-edged, high-resolution output that modern sensors and lenses tend to produce under astrophotography conditions. NiSi also states that the filters can reduce the visual prominence of high-ISO noise during long exposures and improve perceived color separation between warmer and cooler tones in night scenes.

The MAXMAG format addresses a practical limitation. Since lenses such as the Nikon Z 14-24mm f/2.8 S and the Sony FE 14mm f/1.8 GM have bulbous front elements that preclude the use of standard threaded filters, the system uses dedicated magnetic mounting adapters that attach externally around the lens barrel, creating a filter interface where none would otherwise exist. NiSi states the design also supports stacking multiple filters without significant vignetting at very wide focal lengths.

The filters also integrate into NiSi’s existing JetMag Pro magnetic ecosystem.