Sirius Optics 1 1/4\" MV-2 Minus Violet Filter For Sale
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Sirius Optics 1 1/4\" MV-2 Minus Violet Filter:
$29.95
PLEASE NOTE: SIRIUS FILTERS ARE NOT A-R COATED AND REQUIRE INFREQUENT AND VERY CAREFUL CLEANING.This is a filter from the 14 years defunct Sirius Optics from Washington state
Sirius Optics 1 1/4\" MV-2 Minus Violet FilterUsed to suppress the unfocused secondary violet color of achromatic refractor objectives.