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URL: http://www.thaiexcite.com/Levenhuk-Solar-Filter-for-130mm-Reflector-Telescopes.html

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ฟิลเตอร์ส่องดวงอาทิตย์ Levenhuk Solar Filter for 130mm Reflector Telescopes

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รายละเอียด

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Levenhuk Solar Filter for 130mm Reflector Telescopes
Full aperture solar filter for safe observations of the Sun: 116/129/166 mm

If you are an amateur astronomer, a special solar filter is a must in your accessory arsenal! Levenhuk Solar Filter for 130mm Reflector Telescopes will provide your full protection during solar observations. It reflects harmful radiation, reduces image brightness and ensures comfortable viewing for a long period of time.

Levenhuk Solar Filter for 130mm Reflector Telescope is made of special German-made Planetarium AstroSolar Visual film. It has an even surface and provides the same quality and highly detailed views as plane-parallel glass filters. With its help, you’ll be able to observe sunspots, granulation, and faculae.

When choosing a solar filter you should mainly take into consideration your telescope’s optical tube diameter and not the telescope’s aperture. If the filter is to cover your telescope’s front end, you should compare the filter’s inner diameter to your optical tube/dew shield diameter. If the filter is to be placed inside the tube, you should look at the filter’s outer diameter in comparison with the telescope tube diameter. Please measure your telescope before buying this filter and carefully compare your results with the values provided in the Specifications table.

Specifications:
Optical density: 5.0
Filter aperture (film diameter), mm: 116
Inner diameter: 129 mm (5.1 in)
Outer diameter: 166 mm (6.5 in)

CAUTION! Never look directly at the Sun through your telescope or finderscope without a solar filter!