| Brand | Sirius Optics |
|---|---|
| Type | Filter |
| Item Diameter | 1.25 in |
| Country of Origin | China |
Check the listing for details. Sirius Optics Variable Filter System. Condition: New, Made in China. Listed at 99.00 USD. This is a new VFS filter system that I never used. The Variable Filter System, or VFS, is a unique form of interference filter. The filter's glass has coatings deposited on one side of its surface and is unlike died colored glass absorption filters.
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