WASHINGTON, DC, 22 November 2013 — Good to hear from all of you who asked about the technique used in making some of the images in the National Park Service film that I posted yesterday.

Here’s the answer to how two former students of mine, Sarah Gulick and Erin Finicane, did it. To achieve the slow-motion shots of, for example, the young hiker, they used this Sony camera: http://tinyurl.com/n3majx3, with a shutter speed of 60 frames per second. And they exported that footage at 24 frames per second, giving the piece that dreamy look. Because of the camera’s internal, optical stabilizer, they were able to hand-hold the camera. Not all of the shots were made with the Sony. Some of the rock-solid atmospheric shots were made with an HDSLR, and sometimes with the camera mounted on a tripod.

And although that $600 Sony camera is good for this type of effect, Sarah Gulick warned me that it’s not too good for sound. So you have to really be selective about when you use it, and for what purpose.

I hope that helps.