Thousand Oaks 3.25" Solarlite Film Solar Filter


Availability: More on the way

Thousand Oaks SolarLite Film Solar filters allow you to check out the intricacies of sunspots against a majestic yellow-orange solar tapestry.

Our Product #: S3250
Thousand Oaks Product #: S-3250

Product Description

The Thousand Oaks SolarLite has proven itself to be a capable replacement for the glass filters that Thousand Oaks has produced over the decades.  The great American eclipse of 2017 put the product to the test and it passed with flying colors.

After years of R&D we have developed a new solar film that has the optical quality of glass with the advantages of impregnated polymer. Will never develop pinholes or scratches that can let in light and ruin a filter. Other advantages: lightweight and does not require re-balancing tube assembly, will not break, consistent yellow-orange solar image, even density with any aperture, flat surface compared to other thin film filters that have wrinkles and creases. Will not tear or puncture. Stronger than any other solar film on the market.

The O.D. of our cells needs to be at least 1/16″ larger than the OD of the telescope tube or binocular barrel etc. Choose the closest cell O.D. that is LARGER than the O.D. measurement of your instrument. Example: Part number S-4250 (4 1/4″ O.D.) would fit instrument O.D. measurements from 4″ to 4-3/16″. Do not choose a size the same as your O.D. since it will be too tight. Self adhesive felt is included for custom fitting. If your application requires additional felt; Velcro, felt, and other types of material can be found at most fabric or home improvement stores. We cannot take orders for felt.

Clear Aperture: 60mm or 2.37"

Cell OD:  82mm or 3.25"

Tech Details

Color 0 - Not a color filter
Warranty 15 years


Review by:
Spent quite a while learning about dedicated solar scopes and all the headaches and cost of using one. Decided I would first try one of these simple broadband filters and save a boat load of money. This model fits the Astro Tech 60ED perfectly. I fashioned a solar finder from an old white plastic aspirin bottle, which works perfectly. I am using a simple Alt Az tripod, and can have this set up ready in two minutes. I record a 35sec AVI file (using Asi 290MC camera) and process in Autostakkert! I am blown away by the results. Clearly visible are Sunspots, Plages, Filaments and the surface granules. I never expected such detail. My photo looks much better than the daily broadband image from SOHO. BEST $60 I EVER SPENT! (Posted on 8/2/2023)
How do you rate this product? *