Astronomik L-3 Filter

The L-3 filter is designed to block ultraviolet and infrared light while allowing visible light to pass through. This helps eliminate unwanted interference, resulting in sharper stars and clearer luminance data for your astrophotography.

No, you should not need to refocus. The L-3 is parfocal with other Astronomik filters, meaning it is engineered to maintain the same focal point, allowing for seamless transitions during your imaging sessions.

By blocking UV and IR wavelengths, the filter minimizes the bluish halos often seen around bright stars. This results in more defined, natural-looking stars and improved contrast across your final image.

Yes. The filter is constructed from high-quality optical glass with a durable, scratch-resistant coating specifically designed to be resistant to humidity and aging, ensuring long-term performance.

The 1mm thickness is standard for high-quality filters and is designed to minimize optical aberrations. Because it is diffraction-limited, it maintains high image integrity without introducing distortion to your light path.