Lunático Astronomía

Baader Single Polarizing filter



Baader Single Polarizing Filter

To screw into 1¼ or 2″ eyepieces/threads. Useful in Lunar and Solar observations to limit brightness and increasing contrast.

The filter can also be used with a Baader Hershel Wedge to provide an adjustable brightness. Positioned between the Baader Hershel Wedge and Eyepiece the filter/eyepiece combination can then be rotated to adjust brightness.

Polarizer and neutral density filters need additional filtering (for example, Herschel Prism or Astro Solar Safety Film) before the eyepiece of the telescope for observations of the sun. Using without the appropriate filters can cause damage to these filters and eyesight.

Technical Data:

  • Baader 1.25″ Polarizing Filter (1 piece)
  • For stepless brightness-control in combination with another single polarizing filter or a Herschel WedgePerfect for observing moon or planets, or for solar observations with AstroSolar Safety Film ND 5.0. You can change the brightness if you rotate two single polarizing filters against each other, to adjust the brightness according to your magnification. You can e.g. mount one 1,25″ filter in the eyepiece and a 2″ filter in the reducer piece from 2″ to 1.25
  • For solar observation in behind a Baader Herschel Wedge. The Herschel wedge already polarizes the light, so that one single polarizing filter is sufficient.
  • Please note: Polarizing filters (and all other eyepiece filters) may never be used without an appropriate solar filter (Astrosolar front filter, Herschel Wedge).
  • Enhances contrast during planetary observation.
  • You need two polarizing filters to adjust the brightness. Alternatively, you can also use the double polarizing filter #2408340 (1,25″) or #2408344 (2″), where two filters can be rotated in the filter cell. Polarizing filters offer the highest flexibility; if you are looking for superior image quality, you should use regular Neutral Density Filter, where there are fewer glass surfaces in the light path.
FILTER SIZE 1 25 inch 2 inch
MANUFACTURER Baader Planetarium Baader Planetarium
SKU (#) 2408343 2408342
EAN CODE 4047825012449 4047825012456
WEIGHT (KG) 0.06 0.081
TRANSMISSION RANGE Full Spectrum Full Spectrum
AR-COATING Phantom Coating® Group, planeoptically polished Phantom Coating® Group, planeoptically polished
FILTER USAGE Lunar, Planetary, Solar, Specialty Lunar, Planetary, Solar, Specialty
FILTER MOUNTED Mounted (LPFC 6mm) Mounted (LPFC 6mm)
TYPE OF FILTER Neutral Density, Polarizing Neutral Density, Polarizing
SINGLE OR SET? Single Filter Single Filter
FILTER SHAPE round round

If you any doubt, contact us at


Filter thread

1,25", 2"

You may also like…