Thousand Oaks solar filter Black Polymer 120mm B47
Thousand Oaks solar filter Black Polymer 120mm B4750
I used this filter on a 4" refractor mounted as the lens cap
Here the description from the producer:
Black Polymer Solar Filter for Telescope, fits Orion ED 80/100, StarMax , Apex 102, AstroView 100, SkyView Pro 100
120mm4.75" Black Polymer Solar Filter for 101mm4.00" Telescopes. This filter should fit the following telescope models: Orion ED 80/100 or telescopes of similar tube diameter. Part #B4750.
Please read carefully: 120mm4.75" is the diameter of the filter. The filter fits like a cap by friction. To be absolutely sure that the filter will fit, please measure the outer diameter of your instrument and make sure that it is not larger.
Black polymer is the most common filtering material for observing sunspots and granulation, through telescopes and binoculars. The sun will appear in a natural orange color when viewed through your telescope using this filter.
This is a high quality product of Thousand Oaks Optical, Arizona. A manufacturer of safe solar filters for over 30 years. Words of the producer: "Stronger than Mylar with the filtering properties protected within the substrate. Guaranteed five years."
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Filed under: Eyepieces & Accessories