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Baader Neodymium Moon and Skyglow filter

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I recently purchased a Baader Neodymium Moon and Skyglow filter for use as a light pollution filter and contrast enhancer from my rural New Hampshire location.  So far, I've attempted imaging a couple of deep sky objects and found that the filter caused an over all reddening of the image.  When I re-imaged without the filter, the redness disappeared.  Attached is an image of M57 taken a couple of nights ago.  Any thoughts about this redness?  Is this filter meant only for visual use?  Is it meant only for increasing certain details only on planets and the Moon?  PS: Yes, I know that the image is not in focus.  ?

PREVIEW_20180929-21h21m24s095ms.JPG

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Since that filter blocks or dims some wavelengths of yellow/orange, green, blue, and violet, but much less red, it doesn't surprise me that you would have an overall red bias to your color balance:

baader-neodymium-1-1-4-moon-skyglow-filt

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