Hello,

I'm looking to map eel-grass with my UAS, but need to be able to capture certain wavelengths to differentiate between it and other flora.  I know RGB camera would likely be best, but aren't they expensive and best used in a stationary position?  Is there a way to take multispectral images with a Canon (with CHDK) and either preset desired wavelength or filter out the desired wavelengths after the pictures have been captured?  My only other thought is to use a regular camera and put a filter over the lens (do multiple runs if more than one wavelength is desired, then overlay them); is this possible?

,Josh

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