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Optolong
OPTOLONG 36mm" H-ALPHA 7nm FILTER
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OPTOLONG 36mm" H-ALPHA 7nm FILTER
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$269.99
OPTOLONG 1.25" H-ALPHA 7nm FILTER
Part Number:
O-HA-36
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Description
H-alpha 7nm 2" Filter
A very narrow emission-line filter
Permits a 7nm bandwidth of light (focused on the 656nm wavelength) through
Blocks transmission of contrast-killing light pollution wavelengths
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