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Baader Double Polarizing Filter

Baader Double Polarizing Filter

by Baader Planetarium
SKU FPOL-1D (Baader #2408340)
$97.00 - $137.00
$97.00
$97.00 - $137.00
$97.00
Filter Size: 1 25 inch

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Description

Baader Double Polarizing Filter

Screws 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 Sun

Polarizer 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
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FAQ - Problems with filters can have the strangest causes