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Since 1947
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Product Details
#21 Orange (46% transmission) reduces or blocks transmission of blue-green wavelengths. Use on Jupiter and Saturn to enhance detail in the belts and polar regions. Sharpens boundaries between yellow-orange areas and blue-green regions on Mars resulting in a darkening of edge-detail in the maria.
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TPO Product Number: OS-F2-21
#21 Orange Filter:
specifications
| Filter Type | Orange |
| Size | 2" |
| Warranty | 2 Year Warranty |
| Wratten # | 21 |
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United StatesThis is a great little filter.
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