Cool photo, and love the vanishing point perspective the ultra-wide lens give to the road.
There are some interesting aspects to rainbows clearly visible here which many people never notice: The area between the rainbows is darker than inside or out, and it's brightest inside the inner rainbow. This is because light that would reflect at an angle that would fill the darker area is refracted into the bow.
Since a rainbow appears at 42º off-axis from the viewer, an angle of view of >84º will capture the entire primary bow (53º for the secondary bow so >106º for that). Sigma specs this lens at 114.5º but I think it's closer to 122º (Sigma specs DX lenses to their cameras which have a smaller crop than Nikon's). Either way, that comfortably able to capture the entire secondary rainbow!
>> a rainbow appears at 42º off-axis from the viewer, an >angle of view of >84º will capture the entire primary bow >(53º for the secondary bow so >106º for that). > >I did not know that, but that is interesting (and likely >useful) information!
And I believe it is true whether the rainbow is from your backyard sprinkler or rain on the horizon.
Thanks for the comments Larry. I did a bit or reading after taking this shot and read the same type of points you were making. Fascinating stuff, actually.
Similarly interesting is that the secondary rainbow has color order reversed!
>Cool photo, and love the vanishing point perspective the >ultra-wide lens give to the road.
Agreed on the vanishing point perspective. I thought including the car in the shot with my daughter taking an image with her iPhone added to this (the car is pointing at the vanishing point and my daughter is adding a story to the image).
Your daughter adds a human perspective and another cool geometric aspect is that your shadow and the car's of course point directly to the center of the rainbow (as physics requires they would) and make a leading line that connects the human and natural elements.
>Your daughter adds a human perspective and another cool >geometric aspect is that your shadow and the car's of course >point directly to the center of the rainbow (as physics >requires they would) and make a leading line that connects the >human and natural elements.
Thanks Larry for the comments. Agreed on those points. Peter
>I think I know what my wide angle lens is going to be...
Thanks for the comments. I like my 8-16mm a lot. It can be finicky at times to get optimal focus because I think so much is in view (everything from my foot to the distant horizon!). It is a great lens with many creative uses so long as you don't use it too much (super wide looks gimmicky if overused). The only negative is that 16mm is still quite wide so you need to carry along a standard zoom. I carry along my Nikon 16-85 and this makes a great pair.