Thousand Oaks 3.50" Solarlite Film Solar Filter

Thousand Oaks SolarLite 3.50" Solar Filter (S-3500)

Trusted Solar Protection for 3.50" Aperture Telescopes

The Thousand Oaks SolarLite 3.50" Solar Filter (Part #S-3500) is a reliable and rugged solution for safely observing the Sun with telescopes that have an outer diameter of approximately 3.50 inches. Whether you're preparing for the next solar eclipse or tracking daily sunspot activity, this filter gives you the safety, clarity, and convenience needed for successful solar observing.

This filter features Thousand Oaks' proprietary SolarLite film, which combines the resolution of glass with the durability and resilience of a polymer. The result is a high-quality, lightweight solar filter that provides consistent views without the risk of pinholes, creases, or scratching.

Key Features:

• SolarLite Optical Film: Provides sharp, high-contrast views of sunspots and solar detail

• Durable and Field-Proven: Puncture-resistant and built to handle the rigors of outdoor observing

• No Balance Issues: Lightweight construction won’t affect your telescope’s balance

• Secure Attachment: Felt-lined interior ensures a tight, protective fit over the front of your optical tube or dew shield

Compatibility:
Fits telescopes or dew shields with an outer diameter close to 3.50 inches. Be sure to measure your equipment for a secure and accurate fit.

Clear Aperture: 80mm or 3.15"

Cell OD:  90mm or 3.50"

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: