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I recently got a Canon EOS 200D Mark II, it does great astro and milky way photography and I was wondering how to shoot a milky way timelapse. the timelapse settings in the camera make it so the longest shutter speed I use for a timelapse is 1/25 and an ISO of 12800. 1/25 isn't enough for a milky way photo so I was wondering how else I would capture the timelapse? Thanks! (P.S. Any way to do an intervalometer would be great thanks)

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  • Can you really see any stars on a photograph taken using such a huge ISO? Isn't it just noise? Even with top high-end cameras, you would get a very noisy photo, using such ISO, and much worse with your entry-level one. To shoot a star sky, you should use as low ISO as possible with times in seconds or even tens of seconds (up to about 30 seconds when star trails start to appear as the Earth is rotating). Nov 5 '19 at 22:54
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    And I don't understand how the fact you want to shoot a timelapse affects the shooting parameters. Simply use the same parameters you would use for a single photo of the star sky, shoot hundreds or thousands of photos and then put then together into a timelapse video. Nov 5 '19 at 22:57
  • @DavidFerenczyRogožan Having shot at 12800 ISO on a Nikon D5300 (which I think is comparable to a 200D), I can say that brighter stars are still visible, but fainter ones are not distinguishable from noise.
    – Jonas
    Sep 22 '20 at 16:09
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You can use a remote to take the pictures. They are sometimes called cable releases or intervalometers. They allow you to adjust settings to take a series of as many images as you want. The only restriction is the size of your SD card.

There are plenty of cheap (~20$/€) ones. If you cannot find one made specifically for your camera, check that the connector is the same.

intervalometer

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  • Yep, I'm using a very similar one with my Canon EOS 600D. Nov 5 '19 at 22:43
  • The EOS Utility (software) on a computer with a USB cable to connect to the camera can also be used to control time-lapse photography. Sep 23 '20 at 1:07
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The interval-timer on Canon bodies that have the built-in feature work a bit different than an external interval timer.

External Interval Timer

An external timer can either use one of the camera's fixed shutter speeds... or can use bulb mode. In bulb mode, the timer is effectively "holding the shutter button" and releasing it to end the exposure. This means you can set the bulb duration on an external timer.

For this reason, the "interval" that you define on an external timer is the amount of time to wait after the END of one exposure until the START of the next exposure.

E.g. if you want 10 frames, 15 seconds per frame (but using Bulb mode) and a 5 second interval, the timer will take a new exposure every 20 seconds ... where each exposure had a 15 second duration.

Built-in Interval Timer

When using the built-in interval timer (on models equipped with one) the camera menu doesn't ask for shutter exposure duration. This is because it uses whatever duration is configured via the camera's normal exposure controls (be in manual or an automatic mode). But the key here is that it cannot use Bulb mode.

In this mode, the camera simply presses the shutter button at periodic intervals ... with the interval timer not actually knowing how long the exposure will take.

This means that if you know you plan to take 15 second exposures ... but want a 5 second delay between frames, you would have to add those values together 15+5=20 and then program in a 20 second interval.

In other words, the "interval" is the amount of time from the START of one exposure until the START of the next exposure.

This also means that if your "interval" is shorter than your exposure duration, the timer will not work as expected.

Other Options

As previously pointed out, you can get an external shutter release with a timer (some external releases do not have timers). There are several generic external timers but they are sometimes camera-model specific to make sure they have the correct interface cable that works with your camera model (others have the ability to swap the interface cable and can be used across many different cameras).

You can also control the camera via computer. Canon's own EOS Utility has the ability to function as an interval timer. There are numerous 3rd apps that provide similar functionality.

Summary

You might not require any external timer or computer to capture your shots ... if you were setting the "interval" duration to a value shorter than your shutter exposure duration then the timer would not have worked. If this was the case, just increase the interval duration to make sure it is longer than the exposure duration by a few seconds.

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