Thousand Oaks 2.75" Solarlite Film Solar Filter

Thousand Oaks SolarLite 2.75" Solar Filter (S-2750)

Precision Solar Protection for 2.75" Aperture Telescopes

The Thousand Oaks SolarLite 2.75" Solar Filter (Part #S-2750) is engineered for safe solar observation with telescopes that have an outer diameter of approximately 2.75 inches. Whether you're following active sunspot regions or prepping for a once-in-a-lifetime eclipse, this filter delivers sharp, contrast-rich solar views in a tough, travel-ready form.

At its heart is SolarLite—Thousand Oaks Optical’s exclusive film that combines the image quality of glass with the rugged practicality of polymer. It’s more durable than traditional thin-film filters, resistant to tearing and scratching, and won't develop the pinholes or creases that can ruin less robust designs.

Key Features:

• Sharp and Safe Solar Viewing: Reveals surface detail, limb darkening, and sunspot structure with excellent contrast

• Lightweight and Durable: Won’t crack, crease, or tear—ideal for regular field use

• No Balance Disruption: Adds virtually no weight to your optical tube

• Secure, Scratch-Free Fit: Felt-lined cell protects your scope’s finish while holding firmly on tubes near 2.75" in diameter

Compatibility:
Fits telescope optical tubes or dew shields with an outer diameter of approximately 2.75 inches. Please measure carefully before ordering to ensure a proper fit.

Clear Aperture: 50mm or 2.00"

Cell OD:  70mm or 2.75"

SolarLite Film Technology:
After years of research and development, Thousand Oaks Optical has introduced SolarLite—a new solar film that delivers the optical sharpness of glass with the durability and resilience of a polymer. Unlike traditional solar films, SolarLite won’t develop pinholes or surface scratches that could compromise safety. It’s lightweight, so it won’t require rebalancing your optical tube assembly, and it's built to withstand the rigors of field use.

SolarLite offers a consistent yellow-orange solar image across the entire aperture with excellent contrast and uniform density. Its smooth, flat surface ensures sharper views compared to other thin-film filters that often suffer from wrinkles and creases. Tear-resistant, puncture-proof, and more rugged than any other solar film available, SolarLite sets a new standard for safe, high-quality solar observing.

Safety Note:
Before each use, inspect your solar filter for any damage or defects. Never observe the Sun without a securely attached, undamaged filter in place.

Tech Details: