| Compatible Brand | Universal |
|---|---|
| Brand | Lumicon |
| Type | Deep sky |
| Size | 2.0 in |
| Compatible Series | Universal |
| UPC | 791512974483 |
Check the listing for details. Lumicon Minus Violet Filter 2” #LF3125. Condition: Used. Listed at 75.00 USD. Manufacturer part number: LF3125. The choice would depend on how far into the blue your primary lens is color-corrected. The Minus Violet filter blocks wavelengths shorter than about 420nm; the Infrared filter blocks wavelengths shorter than about 400nm.
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