Baader Planetarium Filter

These filters are designed with a standard 2-inch diameter, making them compatible with most 2-inch eyepieces and diagonals. As long as your equipment uses the standard 2-inch format, these will thread directly on.

Yes, you can stack them. Because each filter features a high-quality seven-layer anti-reflection multicoating, they are specifically engineered to minimize light loss and prevent ghosting, even when multiple filters are used together.

Striae are internal defects in glass that can distort light and degrade image quality. By using striae-free substrates polished to such high standards, these filters ensure that the light passing through remains sharp and undistorted, which is critical when observing fine planetary details.

Color filters work by selectively blocking specific wavelengths of light, which increases the contrast of surface features on planets. For example, certain filters can help make cloud bands on Jupiter or polar caps on Mars stand out more clearly against the background.

While they are built to professional standards, they are accessible for any observer looking to improve their planetary views. If you are just starting to explore planetary detail, this set provides a comprehensive range of options to experiment with and learn how different wavelengths affect what you see.