Here’s a long exposure photo that I took on a recent trip out to Yosemite National Park.
It’s a 27 second exposure that I calculated using Slower Shutter (get version 1.1 here). I used a development version of version 1.2 that gives you the option for an audible alert rather than just vibrating when the timer is done. I’ve got to say, I initially thought a vibrate feature alone would be all that was needed, but I really liked the audible alert option.
More photo details.