Thousand Oaks 3.75" Solarlite Film Solar Filter

Thousand Oaks SolarLite 3.75" Solar Filter (S-3750)

Safe, High-Quality Solar Observing for 3.75" Aperture Telescopes

The Thousand Oaks SolarLite 3.75" Solar Filter (Part #S-3750) is designed to bring safe, optically sharp solar viewing to telescopes with an outer diameter of approximately 3.75 inches. Whether you’re tracking sunspot activity or gearing up for the next solar eclipse, this filter offers the image clarity and reliability Thousand Oaks is known for.

At the heart of this filter is SolarLite—an exclusive film that blends the image quality of glass with the ruggedness and light weight of a polymer. It delivers crisp solar detail and a consistent yellow-orange image, all in a field-ready package that won’t throw off your scope’s balance or suffer from the creases and pinholes that plague cheaper films.

Key Features:

• Sharp SolarLite Optics: Reveals sunspots, limb darkening, and surface structure with excellent contrast

• Durable and Lightweight: Tear- and puncture-resistant construction ideal for field use and transport

• No Rebalancing Needed: Keeps your optical tube well-balanced without adding bulk

• Secure Fit: Felt-lined interior ensures a snug, scratch-free hold over your telescope’s front cell or dew shield

Compatibility:
Fits optical tubes or dew shields with an outer diameter of approximately 3.75 inches. Always measure carefully to ensure proper fit.

Clear Aperture: 80mm or 3.15"

Cell OD:  95mm or 3.75"

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: