Optolong Clear Sky Filter
Optolong Clear Sky Filter . Pleated filters, 2 ea size: Clear sky filter is a light pollution filter supressing light pollution to improve contrast of the milk way. Optolong Filters Clear Sky Filter 82mm from www.astroshop.eu 50.8 mm (2) filter shape: Enhance the contrast of images. 75,00 € (2) 5 items in stock.