Bresser EXPLORE SCIENTIFIC 1.25 UHC Nebula Filter
Produkto numeris: 46801
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- UHC Filter for Emission Nebulae
- Blocks almost all artificial light
- Emission lines: Hydrogen Alpha and Oxygen III
- Thread: 1.25"
| Type of Product | Telescope acsessories |
The EXPLORE SCIENTIFIC UHC filter uses a characteristic property of the so called emission nebulae . Those objects glow in special colours, their emission lines. Those emission lines are linked to chemical elements - in this case hydrogen at 486nm and 656nm, plus oxygen at 496nm and 501nm. The Explore Scientific UHC nebula filter blocks all other colours (and thereby nearly all of the artificial light) and only the emission line of the hydrogen and oxygen can pass the filter. The result is astonishing: suddenly nebulae are visible at locations that were completely empty without filters. In suburban skies for example the Owl-nebula M97 , the Veil-nebula NGC699 2 or even the bright Dumbell-nebula M27 are not clearly visible. By using this filter you can see the nebulae and their structures without problems. A must for every visual observer. The EXPLORE SCIENTIFIC nebula filters come with a individual test certificate - your guarantee to receive a premium filter.
FEATURES
- enables the observation of emission nebulae
- blocks almost the entire artificial light
- only the two emission lines of hydrogen and oxygen passes the filter
- 1x 1.25" UHC nebula filter
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12 kitos prekės toje pačioje kategorijoje
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