Filter Test - Astrophotography and Spectroscopy

Astro-Imaging and Spectroscopy

Star Party  St Michel  Haute Provence (France)

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Filter test with the Alpy 600 Spectrograph

Filter combination test
Astronomik UHC + Astronomik  UV/IR cut filter L3
Filter combination against light pollution. Solar spectrum from diffuse daylight.
The Astronomik UHC filter in combination with a Astronomik UV/IR cut filter L3.
The blue line show the profile of filter in combination.  The pink line show
the spectrum of the Hg lamp.
The brown line show the spectrum profile of the planetary nebule M27.
The nebulae line OIII, H-beta and H-alpha were good transmitted .
The Hg Line are good supressed by the filter.
The profile ist corrected for the spectral density of the Atik 414 camera and the spectrograph.

Filter combination test
Optolong L  + Astronomik  UV/IR cut filter L3
Filter combination against light pollution. Solar spectrum from diffuse daylight.
The Optolong L filter in combination with a Astronomik UV/IR cut filter L3 .
The green line show the profile of filter in combination.  The pink line show
the spectrum of the Hg lamp.
The brown line show the spectrum profile of the planetary nebule M27.
The nebulae line OIII, H-beta and H-alpha were good transmitted .
The Hg Line are good supressed by the filter.
The profile ist corrected for the spectral density of the Atik 414 camera
and the spectrograph.

Filter  test
Optolong L-enhanced dual band filter
Filteragainst light pollution. Solar spectrum from diffuse daylight.
The blue line show the profile of filter (solar spectrum).  The green line show
the spectrum of the Hg lamp.
The orange line show the spectrum profile of the planetary nebule M27.
The nebulae line OIII, H-beta and H-alpha were good transmitted .
The Hg Line are good supressed by the filter.
The profile ist corrected for the spectral density of the Atik 414 camera and the spectrograph.
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Copyright  Matthias Kiehl

October  2021
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