Thank you Keith for the resteem, much appreciated.
This rainbow was there for about 10 minutes and I got it from a few different angles as the boat moved along the lake.

Rainbows are so cool especially from a photographic point of view. Because it's all right there. The thing we try to capture...light in it's many refracted elements.
The lens helps. Sigma 30 mm has very fast glass so the Magenta really pops out.