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It's great to see these spectra being photographed.
I have looked at the solar spectrum countless times reflected in CD's and DVD's. I have found the best view to appear when holding the CD/DVD right up to the eye and catching the 2nd order reflection (1st is usually too bright). No slit is necessary, just use the direct spectrum from an unobstructed view of the sun and let your eye relax and focus on infinity - then you'll see LOTS of lines all the way through the spectrum. With this method I can easily resolve the double Sodium lines in the yellow part. I must concur with Rob that the visual view is far better than what the photos show (although you guys' photos are excellent). Oddly enough I have never made an effort to photograph this, but in light of your excellent results I think I might have a go soon. Thanks for sharing your results, it's very inspiring.
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