Antares Ultra High Contrast Nebula Filter
UHC is a filter that blocks the visual spectrum except for wavelengths between 480nM and 510nM. Often called a Nebular or ALP (anti-light pollution) filter, this allow passage of ionized oxygen and hydrogen lines, but blocks light pollution reflectance from mercury and sodium vapor lamps.
2" Filter is a Sky-Watcher filter
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From $60.00
Antares Ultra High Contrast Nebula Filter—
$60.00
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Description
UHC is a filter that blocks the visual spectrum except for wavelengths between 480nM and 510nM. Often called a Nebular or ALP (anti-light pollution) filter, this allow passage of ionized oxygen and hydrogen lines, but blocks light pollution reflectance from mercury and sodium vapor lamps.
2" Filter is a Sky-Watcher filter
