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IC5070 The Pelican Nebula
The star colors are what they end up with these narrow-bad filters, you can perform star color calibration to get them more natural but that will change the nebula as well. You would need to add RGB to get it more natural in total. Lighter may be the effect of saving them in a tighter color space (say you saved them in JPEG, this is 8-bit if I remember correctly, which is much tighter then 16-bit and that will affect the data).