Spectrum Full-Aperture Thin Film Solar Filter 3.25" ID – ST325BP1

Spectrum Full-Aperture Thin Film Solar Filter 3.25" ID – ST325BP1 is a lightweight, full-aperture solar filter made with durable optical thin film for safe sun and eclipse viewing through compatible telescopes.

• Full-aperture thin film solar filter
• Durable aluminum cell
• Secure fit with nylon thumb screw and felt padding
• Designed for safe direct viewing and solar photography through a telescope

Fit note: Measure the outside diameter of your telescope tube and order the next larger filter size.