SIGHTRONJAPAN Sightron Japan Astronomical Filter IR Pass Filter IR800 PRO American Size SY0098 31.7mm

IR800 PRO is an IR pass filter that transmits near infrared rays above 800nm. It cuts visible light and transmits near-infrared light, so by using it instead of L images when photographing the Hα region or imaging planets, you can capture patterns on the planet's surface with emphasis. Because it cuts visible light and transmits only near-infrared light, you can expect to capture sharp images with high contrast and reduced effects of seeing. Synthetic quartz glass is used for the substrate. It is stronger and more heat-resistant than regular optical glass, which means less distortion during coating and excellent deposition stability and surface precision. While most conventional IR pass filters are made of colored glass, all IR PRO series filters are high-precision evaporated filters, minimizing image degradation caused by the filter even when photographing planets at high magnification. The size is American size (31.7mm) which is convenient for shooting with CMOS cameras such as ZWO and QHY.