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Old 27-03-2015, 01:24 AM
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cometcatcher (Kevin)
<--- Comet Hale-Bopp

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Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Interesting comparison. That internal filter really cuts back a lot of light, so you gain almost an F stop by removing it (except in cyan) and much more in Ha.
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