This is excellent info. I wanted to include some of this because it's important to know these things if you want the picture to be convincing. My picture isn't the best candidate but it was the best I had in stock. Great list - I didn't know some of these facts.


Rainbows are also often denser at the ends and this bothered me because my bow is the opposite. This is because the screen blending mode gives more color when laid over darker areas, so the light horizon only gets a light rainbow. Any tips how to fix this?


Something else that is helpful, and that's to look at a Flickr Rainbow Group and compare your results with the real thing.