Thousand Oaks 4.75" Solarlite Film Solar Filter

Thousand Oaks SolarLite 4.75" Solar Filter (S-4750)

Reliable, High-Contrast Solar Viewing for 4.75" Aperture Telescopes

The Thousand Oaks SolarLite 4.75" Solar Filter (Part #S-4750) is designed to provide safe and sharp solar views for telescopes with an outer diameter of approximately 4.75 inches. Whether you're observing sunspots, tracking a solar eclipse, or doing solar outreach, this rugged and optically clear filter is built to deliver reliable performance under real-world observing conditions.

This model uses Thousand Oaks' proprietary SolarLite film—a material that brings together the image quality of glass and the toughness of polymer. It’s lightweight, easy to install, and won’t require you to rebalance your optical tube assembly, making it an ideal fit for both portable and permanent setups.

Key Features:

• SolarLite Film Optics: Delivers excellent resolution and contrast for viewing solar features like sunspots, faculae, and limb darkening

• Durable Construction: Resists scratches, pinholes, and tears—suitable for frequent use and fieldwork

• No Rebalancing Required: Lightweight design won’t affect telescope balance

• Secure Fit: Comes with felt-lined mounting to ensure a snug, scratch-free fit over your telescope’s front cell or dew shield

Compatibility:
Designed to fit telescopes with an outer diameter of approximately 4.75 inches. Always measure your optical tube or dew shield carefully before ordering to ensure proper fit.

Clear Aperture: 101mm or 4.00"

Cell OD:  120mm or 4.75"

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:
Inspect the filter for any damage before each use. Never observe the Sun through any telescope, binoculars, or camera without a properly mounted, undamaged solar filter in place.

Tech Details: