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Long Exposure Time-lapse Essentials

Rich Harrington 11/21/2013 10

In order to capture a moving street shot, I turned to long exposure. To really see the lights and energy of the scene, I wanted to elongate the action. Heres the logic I applied to the shot.

LETLCompare

  1. First I set the camera to manual mode to avoid any significant settings changes from shot to shot. With timelapse, you want to see variation over time, so the last thing you want is an aperture or shutter changing.
  2. Next I stopped the camera all the way down and shot /22. This let the least amount of light into the sensor.
  3. I set the shutter speed to create the sense of motion. In this case I found that 2.5 seconds was enough for the look I wanted. People and cars standing still (at the intersection) were relatively clear, while those in motion became a long streak. I also wanted the lights to take on a starburst.
  4. Lastly I refined the ISO to achieve a proper exposure. In this case a value of ISO 800 was needed to get the shot. This was due to the smaller sensor of the OM-D E-M1 and the fact that I was stopped down so small.

adjustletl

Once the shot was done, assembly was easy. Weve covered these techniques already on Photofocus. Heres the highlights of my workflow.

  1. I used Adobe Camera Raw to develop the files and sync the same settings to all images. In this case a slight Clarity and Curves adjustment helped. Noise reduction was also used.
    LETLBA
  2. An image sequence was created.
  3. The image sequence was imported into Adobe After Effects.
  4. I interpreted the sequence at 12 fps (half the frame rate I needed).
  5. I stretched the image to 200% and turned on frame blending. This forces a motion blur between shots (essentially a series os short dissolves) to emphasize the streaking.
  6. I used keyframes to create a zoom on the shot.

All in all, post processing was only 10 minutes to create the shot. I am happy with the end results and continue to explore using smaller apertures and longer exposures when shooting timelapse shots of nighttime activities or subjects that involve water or wind.

Disclaimer: This is just one way to shoot and process these types of scenes.

______

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Rich Harrington

Publisher at Photofocus
Richard Harrington is the CEO of ThinkTAP and the Publisher of Photofocus.He is also the founder of RHED Pixel, a visual communications company based in Washington, D.C.

Rich has published over 100 courses on Lynda.com. Rich has authored several books including From Still to Motion, Understanding Photoshop, Professional Web Video, and Creating DSLR Video.
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Categories: Cinematography Learn Shooting Shooting Tutorials Tags: lc-video Learning Center long exposure time lapse tutorial

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Reader Interactions

Comments

  1. Shirshak Baniya says

    November 21, 2013 at 6:09 am

    great and inspirational work. i am going to try this.

     
    Reply
  2. kyle says

    November 22, 2013 at 5:18 am

    Why use f22 when there will be massive diffraction at that Aperture? You could have used base ISO vs 800 and had a long exposure that was sharper and had less noise.

     
    Reply
    • Richard Harrington says

      November 22, 2013 at 5:21 am

      Because I specifically WANTED that effect. I wanted the light to bend and wrap around the subject for shooting this time-lapse. Artistic choice and I don’t always choose a technically perfect image (particularly when I want the light to appear to move from frame to frame). With timelapse, the challenge of keeping movement smooth between frames is essential.

       
      Reply
      • kyle says

        November 22, 2013 at 8:38 am

        Now this makes sense in the context of the starburst look. Thanks for clarifying

         
        Reply
  3. ralf_adolf says

    November 25, 2013 at 10:40 am

    amazing ! and nice blog ,I love photoghraphie but I am a noob ,and I learnd alot from your blog thank you

     
    Reply
  4. Davis Seah says

    February 1, 2014 at 10:03 pm

    How many shots need to be taken?

     
    Reply
    • Richard Harrington says

      February 2, 2014 at 5:30 am

      Depends. 6-24 make a second of finished timelapse

       
      Reply
      • Mike says

        February 19, 2017 at 3:57 pm

        I have a rebel t5i and I can only take a max of 10 shots. Is there a way to change that?

         
        Reply
        • Richard Harrington says

          February 19, 2017 at 5:16 pm

          Use an external remote…. that can do it.

           
          Reply

Comment Policy: Vigorous discussion is welcome. Please use your real names and respect one another.

Trackbacks

  1. Long Exposure Time-lapse Essentials : LSSWorld Photo says:
    November 22, 2013 at 9:14 am

    […] Here’s the logic I applied to the shot. […]

     
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