Intervalometers are inexpensive and invaluable, so why not throw one or two of these in your bag?

But what is it? A intervalometer is basically a remote shutter release that offers more controls. It allows you to tell the camera shutter when to shoot, how long the shutter should stay open and how long the shutter should remain closed until it opens again.

Night photographers use these to create star trails, time-lapse, a succession of images to “stack” to reduce noise in high ISO photos,and more while avoiding vibrations.

Intervalometers come in different forms, including wired and wireless, with some allowing you to control your camera using an app on your smartphone. I use a wired intervalometer because they are inexpensive and very reliable.

This is my trusty Vello Shutterboss II for my Pentax K-1, hence the punny “Kentax” name. Never run away from a great pun.

Understanding the settings of an intervalometer

Let’s go over some of the settings so we can better understand what they are and why we use them. I use a wired Vello Shutterboss II, and many wired intervalometers currently available have similar or identical controls. Look for the black horizontal line, which tells us which setting we are viewing or adjusting.

Self (Self-Timer Delayed Release)

The first setting is the self-timer. This allows you to set the amount of time it takes for the camera to initiate the sequence you have programmed into the intervalometer.

This helps us with anything from doing selfies to getting into position to light paint a tree or abandoned building. This intervalometer allows you to set the time anywhere from one second to 99 hours, 59 minutes and 59 seconds. Wow! Below, it is set to 0 seconds, so the camera will start clicking right away.

Long (Timed Exposure Length)

How long do you want each exposure to be? Right here is where you set it! This one is set for two minutes. This is especially handy because most cameras have a maximum exposure length of 30 seconds and offer a limited amount of long exposure times.

Intervalometers allow you to specify a shot between one second and 99 hours, 59 minutes and 59 seconds. And yes, that means that you cannot photograph anything shorter than one second.


The interval setting allows you to control the time period between two or more shots. If you want to do time-lapses, perhaps you might want some time to pass between shots. On the other hand, if you want to do star trails for “stacking” later, you want the shortest possible time between shots.

The interval shown below is set to one second, the shortest time between shots possible on most intervalometers.

No. (Number)

The number simply stands for how many photos you wish to take in your sequence of shots. Below, I have this set for 10 consecutive shots. You may set it anywhere from 1 shot to 999 shots. After running the sequence, the camera will stop unless set it to infinity. This is typically signified by two dashes ( — ). On this setting, your camera will shoot and shoot and shoot …

How night photographers use an intervalometer

Now that we know what the four basic settings are (I’m not going to go over whether you want a beep or not), let’s apply this to some real-life night photography scenarios.

Star trails

Many night photographers love to show the perceived movement of the stars caused by the earth’s rotation of long periods of time. Taking a succession of shots and “stacking” them together for post-processing is a great way of achieving this while minimizing noise.

In the photo above, I set my intervalometer at four minutes and photographed the starry night sky for two hours in total.

The settings would have looked like this:

  • Self (Self-Timer Delayed Release): 0 seconds
  • Long (Timed Exposure Length): 4 minutes
  • Interval: 1 second
  • No. (Number): 30

Stacking to reduce noise for milky ways

Many night photographers use intervalometers to take 15-20 photos in succession to reduce noise for their high-ISO Milky Way photos. For the above, I set my intervalometer to take photos for 20 seconds each.

For this photo, the settings are:

  • Self (Self-Timer Delayed Release): 0 seconds
  • Long (Timed Exposure Length): 20 seconds
  • Interval: 1 second
  • No. (Number): 31 (the slightly strange number tells me that I most likely set the device to click away on “infinity” while I grabbed a snack!)

Never dangle your intervalometer

I’ll leave you with this important bit of advice: Never let your intervalometer dangle from your camera. Several things may happen — none of them good!

The intervalometer jack may get pulled out of the camera

This may stop the entire shooting process you’ve set into motion. You don’t want that to happen, do you? No. No, you don’t.

The intervalometer may swing

This isn’t so great either. It doesn’t take much wind to get your intervalometer to star tapping against the tripod and cause shakes and vibrations.

The intervalometer cable will weaken

This occurs over time when the cable gets increasingly stressed. As it is, this is a common point of failure for intervalometers, so why hasten its death?

Pro tip: Velcro to the rescue!

I would never leave you hanging (apologies for the pun). There’s an easy solution, and it’s called Velcro. Yes, that’s right, add a strip of Velcro to the back of your device and to your tripod leg. No more swinging.

I hope this helps. If you have questions, please leave them in the comments below!