Jeff, that narrow band image I did of Eta Carina has purely arbitrarily assigned colours, and I'd be a little more than concerned if an image from my DSLR ended up looking like that
.... You are never going to get accurate colour by imaging through narrow bandpass filters that only look at very specific parts of the spectrum, hence this is not really relevant to my original post....I simply wanted to make sure people don't get the two confused.
The colour of a celestial object can tell you a lot about it. Malin's "Colours of the Stars" devotes a couple of hundred pages to the topic, and is well worth the read.
With a modified DSLR, as with CCD's stars will saturate to white from the IR component. Using an IR cutoff is pretty much standard issue as the fix
