Each installment features a photographer discussing a piece of equipment they can't do without—and a photograph they couldn't capture without it.

Photographer: Tori Kelner

Equipment: Glass Triangular Prism

I mainly shoot portraits outdoors using natural light, so I tend to travel with very little equipment. I always make sure to carry a few small objects with me to create depth and atmosphere in my images, though. The glass prism is a super affordable and useful object to bring on a shoot; it refracts sunlight and creates incredible rainbow effects that are pretty magical looking! By moving the prism around the edge of the lens, the light is going to bounce in entirely different ways with every slight move. Certain angles will reflect the surrounding environment to create what looks like a double exposure, as well. The idea of putting an object between your lens and the subject is called "interference," and I use this technique not only with the prism but also with leaves, flowers, branches, plastic bags, glass crystals, CDs, or small objects to create a hazy touch of color and interest.

I do not rely on the prism for an entire shoot, but I bring it out a few times during the session to add some variety and excitement to certain pictures. For the first image, it was an overcast and rainy day, but the prism still caught a little bit of light, which caused the vibrant rainbow streaks. I adore how it leads your eye right to the model and highlights the rain drops that would have otherwise been lost among the dark background. In the second image, the prism reflected the wheat in the field surrounding the model, which creates a double exposure or layered effect that has a more surreal look to it rather than a standard portrait. There are so many ways to use the glass prism to add a little extra excitement to your work.

Below is an image of Tori's showing the layered/double exposure effect.