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Optical vision 125 inch light pollution filter
optical vision 125 inch light pollution filter
Optical vision 125 inch light pollution filter
The sky watcher 125 inch light pollution filter is a contrast enhancing anodised aluminium optical glass filter designed to block out the wavelengths of light emitted by mercury vapour light and other common causes of light pollution whilst providing higher transmission at critical hydrogen alpha and hydrogen beta lines than competing filters bright light polluted skies appear much darker and the contrast between object and sky is improved significantly this contrast enhancement effect is

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