This 2” Lunt polarizing filter is designed primarily to thread into 2” eyepieces used with the Lunt LS2HW Solar Wedge to control the image brightness during white light solar observing with larger aperture (up to 150mm) refractors. It can also be used in 2” prime focus adapters to control the exposure time during imaging.
The Lunt Solar Wedge produces partially polarized light. This 2” polarizing filter is threaded into the base of a 2” eyepiece or 2” prime focus camera adapter. By turning the eyepiece or camera adapter containing this polarizing filter in relation to the Solar Wedge body, the image brightness of the polarized light coming from the Solar Wedge will gradually be reduced to a comfortable level with larger aperture refractors.
This polarizing filter is intended primarily for visual use and must be used in conjunction with the existing internal Neutral Density (ND) filter within the Lunt Solar Wedge. A polarizing filter does not provide sufficient blocking by itself, nor is it able to block IR wavelengths as completely as the ND filter in the Solar Wedge. Also, the polarizing filter must be used in the eyepiece or camera adapter, never in the Solar Wedge’s 2” nosepiece (ahead of the ND filter within the Solar Wedge). The polarizing filter must be located after the ND3.0 filter in the Solar Wedge to prevent damage to the delicate internal layers of the polarizing filter.
Plane/parallel optical glass, precision polished for optimum performance. Fits standard 2” eyepiece filter threads in eyepieces and 2” prime focus camera adapters.
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