For those who follow Wild Photo Australia on facebook you will have noticed recently that I've been playing around with a technique to simulate long exposure photography without a tripod. I've been primarily using this technique with my phone, as I obviously never have a tripod with me for my phone, and even if I did, I can't take actual long exposure shots with it anyway. This technique also has the added benefit of reducing digital noise in an image, of which my phone produces plenty.
You can of course do this with any camera that can take a continuous burst of shots. You can also do it in the middle of the day, a time that it is virtually impossible to take a real long exposure shot unless you have a strong ND (neutral density) filter to put on your lens.
The technique involves capturing a burst of fast single images and stacking them in Photoshop via the "mean" stack mode. Even on images that don't have any movement in them (for example flowing water or clouds), it's a great technique to reduce the digital noise in your photos and effectively increase resolution. Although, a median filter is more commonly used in these cases (i.e. no long exposure effect).
Anyway, here's the tutorial. Enjoy!