How is this done?

What's the key to keeping focus on the subject when doing this zooming in/out technique?
https://www.facebook.c​om …4876211652&type​=3&theater

I tried it several times & only once got even close to keeping my target in focus because of the slow shutter

My guess is that its the radical blur filter in photoshop and some creative photoshop layering

umphotography, I would maybe guess that with anyone else, but this photographer is not the sort who does a lot of PS wizardy. She posted in the comments (or rather, she posted "Yes!" to someone's guess) that it was slow shutter speed with a pop of flash to freeze the subjects. So, that means she had OCF somewhere out of camera view, triggered? That would compensate for camera shake with the slow shutter speed?

The technique was sorta explained and confirmed by the photographer in the comments: "slow shutter, zooming out lens burst of flash to freeze couple" but I am not sure that I completely buy it. It appears that it is two shots as per one of the other comments: "I am guessing this is a combination of 2 images. One with lens zoom burst and one without. Then stitched in photoshop to take the zoom burst off the couple. ".

my guess is she used a tripod to steady the camera, 2nd curtain flash to freeze the subject but i have to agree that this might be a double-exposure shot, either in-camera or through post, otherwise where are the lights coming from?

taemo wrote in post #16478837
my guess is she used a tripod to steady the camera, 2nd curtain flash to freeze the subject but i have to agree that this might be a double-exposure shot, either in-camera or through post, otherwise where are the lights coming from?

They look like market lights draped over the dance floor. She did clone out one market light which would have ran directly through the couple.

the flash pops the people with a long exposure then zoom out to get the drifting lights