SVBONY CLS Lens Filter for suitable for use with astronomical Astrophotography, 2.0-inch, telescopes, etc. (2.0 inch)

------------------------------------------------------------------------------------------------------------------ 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ------------------------------------------------------------------------------------------------------------------

This filter removes unwanted light (light pollution) such as city lights when observing and photographing nebulae, star clusters, comets, etc., and allows light from celestial objects to pass through. By cutting out the emission lines from mercury and sodium lamps, which are the source of light pollution, the sky becomes clearer, and more stars appear more clearly. By transmitting emission lines such as OIII and Hα, it becomes possible to photograph nebulae and other objects with high contrast. Because it uses high-quality optical glass, the filter surface precision is extremely high, allowing for high-resolution observation and photography. You'll be able to capture stars near the horizon, making observation and photography incredibly convenient. Effects of Light Pollution: The most common effect of light pollution is that the night sky becomes brighter, making it difficult to see stars. In a natural night sky, when there is no moonlight, thousands of stars and the Milky Way can be seen with the naked eye. However, in areas with significant light pollution, not only is the Milky Way completely invisible, but the number of stars that can be seen with the naked eye is extremely limited. CLS Filter: CLS stands for "City Light Suppression," and it is a filter designed to reduce light pollution that illuminates the night sky and makes it difficult to see stars. Specifically, it cuts out the wavelengths emitted by mercury lamps and sodium lamps, which are commonly as streetlights.