Optolong Variable Polarising Filter

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About this product

Optolong Variable Polarising Filter

The Optolong Variable Polarizing Filter is available in both 1.25" and 2" mounted sizes.

Simply rotate the two components to vary the transmission and image brightness.

A variable polarising filter is ideal for imaging the moon and the option to vary the brightness depending on lunar phase and the image scale being used provides very good versatility and image quality.

Features

• Multi Layer Anti Reflection Coatings
• 2mm thick Schott B260 optical glass 
• Precision CNC-machined metal filter cell 
• High quality protective plastic storage case
• Available in both 1.25" and 2" Sizes

Specification

• Brand: OPTOLONG
• Type: Variable Polarising
• Size: 2-Inch
• Substrate Thickness: 2mm
• Clear Aperture: 44mm
• Surface Quality: 60/40
• Surface parallelism: 1/4λ
• Parallelism: 30"
• Thread: M48*0.75
• Single Thread: Yes

Warning: Optolong filters are not designed for direct solar observation. NEVER use these filters for observing the Sun, or permanent eye and equipment damage will result.

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