Baader Planetarium 31mm Round Clear Glass Focusing Filter, Unmounted

Key Features

• Achieve pinpoint focus with this 31mm clear glass focusing filter for astrophotography.
• Protect your valuable telescope optics from dust and debris with this clear filter.
• Enjoy full spectrum transmission for accurate color rendition in your astro images.
• The dielectrically coated glass ensures plane optically polished image quality every time.
• This unmounted, round filter is easy to install and fits most standard telescope setups.
• Weighing only 0.06 lbs, this lightweight filter won't affect your mount stability.