Helios Glass Telescope Solar Filter (5.75")
Solar filter designed for telescopes, ND5-rated to block 99.999% of sunlight. Glass with reflective coating mounted in an aluminum outer cell to observe and photograph the sun's surface and features
Highlights
- ND5-rated protection
- fits common telescope diameters
- durable aluminum housing
Pros
- ND5-rated solar protection
- High-quality glass with reflective coating
- Fits 5 3/8" to 5 5/8" telescope diameters
- Aluminum outer cell for mounting
- Suitable for sunspot and eclipse observation
Cons
- Limited to specific tube diameter range
- No explicit data on durability under impacts
Best For
Features
- ND5-rated solar filter blocks 99.999% of sunlight for safe viewing
- Glass construction with reflective coatings on both sides in an aluminum outer cell
- Clamp-on design with nylon thumb screws and felt tabs to protect telescope
- Fits optical tube diameters 5 3/8" to 5 5/8" (137–143 mm) and 5.75" overall diameter
- Designed to observe sun features such as sunspots and eclipses
