Baader Double Polarizing FilterScrews into 1¼ or 2" eyepieces/threads. The two filters can be rotated relative to each other to variably adjust the brightness level for lunar observations. The Baader Double Polarizing Filter can also be used for solar observations in combination with an objective sun filter made from Astro Solar Film.The double polarizing filters in 1¼ or 2" can not be separated into two parts, so you can't take one half as a single filter e.g. for a Herschel wedge. The reason for this is stability and quality: If both housings could be separated, they may move or be tilted to each other, which could harm the image quality and cause reflections.Important Information for Observing the SunPolarizer and neutral density filters need additional filtering ahead of the scope or eyepiece for any observing of the sun (for example, Baader Herschel Prism or Baader Astro Solar Safety Film). Using without the appropriate safe solar filters can cause permanent damage to the these filters and eyesight. Specifications 1.25" MANUFACTURER Baader Planetarium SKU (#) 2408340 EAN CODE 4047825012463 WEIGHT (KG) 0.042 TRANSMISSION RANGE full Spectrum FILTER THICKNESS (WITHOUT CELL) 2 mm AR-COATING Phantom Coating® Group, planeoptically polished SPECIAL FEATURES double polarizing filter for stepless brightness adjustment FILTER SIZE 1 25 inch FILTER USAGE Lunar, Planetary, Solar, Specialty FILTER MOUNTED Double mounted (LPFC 6mm) - total height 15mm TYPE OF FILTER Neutral Density, Polarizing SINGLE OR SET? Single Filter FILTER SHAPE round 2" MANUFACTURER Baader Planetarium SKU (#) 2408344 EAN CODE 4047825022714 WEIGHT (KG) 0.078 TRANSMISSION RANGE full Spectrum FILTER THICKNESS (WITHOUT CELL) 2 mm AR-COATING Phantom Coating® Group, planeoptically polished SPECIAL FEATURES double polarizing filter for stepless brightness adjustment FILTER SIZE 2 inch FILTER USAGE Lunar, Planetary, Solar, Specialty FILTER MOUNTED Double mounted (LPFC 6mm) - total height 15mm TYPE OF FILTER Neutral Density, Polarizing SINGLE OR SET? Single Filter FILTER SHAPE round FAQ - Problems with filters can have the strangest causes
