High-Quality German Schott Glass
The filter is crafted from high-grade German Schott optical glass, with a diameter of 2 inches (50.8 mm) and a thickness of 2 mm. It undergoes double-sided polishing to ensure an exceptionally smooth, flat surface, providing outstanding optical performance suited for demanding astrophotography applications.
IAD Dense Coating Process
Using IAD (Ion-Assisted Deposition) coating technology, the coating layer is dense, wear-resistant, and highly stable, with minimal temperature drift. This significantly enhances the product's lifespan. The high coating strength effectively improves durability and ensures stable imaging quality.
High Transmission Rate of Anti-Reflective Coating
Durable and Easy to Clean
Compatible with Full-Frame and APS-C Equipment
Constructed with a single-piece, glue-free design, this filter is compatible with both full-frame and APS-C astrophotography equipment, including astronomical eyepieces and cameras. This offers users a wider range of compatibility options.
Premium Aluminum Frame for Flexible 2-Inch Filter Wheel Compatibility
The filter frame is crafted from high-strength aluminum alloy, featuring an anodized matte finish for excellent corrosion resistance. It is easy to handle, durable, and compatible with most mainstream 2-inch electronic filter wheel. This allows users to conveniently pair it with other equipment for greater flexibility and ease of use.
Precise Wavelength Positioning
The 2-inch series filters offer high-precision wavelength positioning, with a tolerance of only ±0.3 nm, which is crucial for astrophotography. These filters effectively block or enhance specific wavelengths, enabling accurate capture of celestial objects' emission lines or absorption spectra. This ensures true-to-life image reproduction and accurate data for celestial observation and analysis.
Filter Orientation Guide
The side that reflects like a mirror and shows no ghosting of objects should face the telescope, as shown in the left image.
The transparent side, where you can directly observe the inner edge of the glass and see ghosting of objects, should face the camera, as shown in the right image.
