
If you intend to shoot a timelapse without identical intervals, you are likely going to want to consider a remote shutter. I would make sure you don’t have some sort of built-in intervalometer before considering shooting time-lapse without one – unless there’s a specific aesthetic reason you don’t want to use a consistent interval. You can change camera settings while these exposures are being taken. If you enable the “interval timer”, you can set the time between each exposure. For the version of canon firmware I am using, for example, the intervalometer is labeled as “interval timer” in the fourth table in the menu under the camera icon. You should check your camera’s menu and manual. Is it that you don’t want to use an intervalometer, or is it that you just don’t have one available? And, secondly, are you sure you don’t have an intervalometer? You may have an intervalometer after all

1 You may have an intervalometer after all.
