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A Rainbow is something that has the power to stop you in your tracks when it unexpectedly appears when you’re least expecting to see one. They’re beautiful - but how do you photograph a rainbow?

Following are a few Rainbow Photography Tips that come to mind - feel free to add your own to comments below:

Find a Rainbow

This is probably the hardest part of the process. Their appearance will depend upon the conditions and they are something that will often happen completely out of the blue. Having said this - you should especially be on the look out for rainbows when you have two elements present - falling/spraying water droplets and bright sunlight. As a result they’re common when a storm is approaching and around waterfalls/sprinklers/fountains.

Backgrounds

As rainbows are not solid objects one of the keys to photographing them is to capture them in front of a background that allows them to stand out as much as possible. Ideally you’ll want to get a background that is uncluttered and if possible one that has darker colors (think dark clouds, mountains etc). While it’s not always possible to change the background - you might find that you’re able to change the angle that you’re shooting from or to focus just upon part of the rainbow that is in front of a good background.

Composition

While rainbows are a beautiful thing - it’s the surrounds that they appear in that make one rainbow photograph really stand out from others. As a result it’s important to carefully think about how you compose your shot when photographing them. Particularly pay attention to the following:

Positioning - how you position the rainbow (and the rest of the landscape) in your shot is important. Rules like the rule of thirds could be useful when thinking about focal points and leading the eye into your shot.


End Points of the Rainbow - the point where a rainbow hits the ground/horizon is an important point in any rainbow photograph. This is a natural point of interest so think about where you’ll put it in the frame. You might want to zoom in on this spot or even quickly change your own position so that it lines up with some other object in the scene.


Zoom/Wide Angle Perspectives - quickly experiment with different focal lengths (if you have different lenses or a zoom). A wide angle lens that captures a full rainbow can give you some wonderful wide vista shots - but don’t forget that zooming right in on a part of the rainbow can also lead to spectacular results. Particularly focus in on any point where the rainbow intersects with any object - or where it begins and ends.


Foregrounds

Consider not only the background of your rainbow shots - but the foregrounds. These can add interest to the shot but also lead the eye towards focal points. Also scan the foreground for distractions that you could remove.

Multiple Rainbows

Keep in mind that where there is one rainbow there can often be a second one - or at least another layer of one that arches over the first. Including both can lead to an extra layer of interest in the shot

Polarizing Filter

If you have a polarizing filter experiment with rotating it to see what different effects it will have. You’ll find that in doing so you’ll get different saturations of colors, reflections and levels of contrast in your shot which can drastically impact the shot and help the rainbow to stand out more.

Aperture

Choosing different apertures will have less impact upon the rainbow itself and more effect upon the overall shot. Choose a small aperture and you’ll get as much of the scene in focus as possible (ie it’ll have a large depth of field).

Tripods

Keeping your camera as still as possible is important in all landscape shots - but it’s particularly important for rainbow shots as they often appear in darker conditions (like before a storm) and if you use a polarizing filter and a small aperture you’ll probably need to use a longer shutter speed. Of course rainbow shots are not something that you can always plan for - so you might need to find some alternative ways of securing your camera.