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Old 10-04-2012, 09:57 PM
Carl
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CWB for modded DSLR

Would a A) grey card or B) White card imaged at noon give more accurate star colours when set as the CWB for astro imaging with a modified DSLR camera? And C) would this have an adverse effect when trying to capture the red in emmission Nebula?
It is suggested on the grey card manufacturers guide sheet that grey card is around 1 to 2 stops darker when imaging at low light.

Any suggestions?

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Carl Rainer
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  #2  
Old 11-04-2012, 01:27 PM
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gregbradley
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Photographic 18% grey card imaged in sunlight around midday gives accurate white.

Greg.
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  #3  
Old 11-04-2012, 05:36 PM
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Merlin66 (Ken)
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The CWB is for daylight shots of the family.
No need to use it when doing astro imaging.
The image needs to be saved as a RAW file and processed across the RGB channels.
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