The Relationship of Shutter Speeds and Apertures to Flash

In this information-packed photography class exploring relationships between flash power, aperture settings and shutter speeds, Karl explores four key areas:

  • Understanding flash sync speeds
  • The relationship between ambient light and flash
  • The relationship between aperture and flash
  • First and second curtain flash synchronization

Karl demonstrates how each of these can work together to influence the final image.

In this photography class we cover the following:

  • How shutter speed works
  • Sync speed vs flash duration
  • Leaf shutter vs focal plane shutter
  • Shutter speed and aperture
  • The impact of ambient light on an image
  • Controlling flash exposure
  • Combining studio and ambient light

NOTE: This photography class is available with English subtitles.


  1. This class was amazing. Karl I don’t know how to configure my sony alpha 7 camera so that it does the flash at the beginning or at the end.

  2. Hi Karl,
    Thanks! I understood the relationship between the ambient light and shutter speed. Basically if I leave the shutter speed longer, it will let more ambient light in. I re-looked at the video and understood this time.

    Thanks for the help! Loving the classes.


    1. Hi Tummavg, I think I’ve already asked you to watch the following classes which should have given you the answer as the answer is in the classes? Are you watching these classes properly?
      Once you have watched the classes above then this section of classes will make more sense to you and they cover various situations where you would need to sync your flash at different shutter speeds based on the surrounding ambient light. Do not watch these classes first, please watch the other 2 classes first as it appears you are missing some valuable information.

Leave a Comment