How Aperture, Shutter Speed And ISO Affect Pictures Shown In A Chart

How Aperture, Shutter Speed And ISO Affect Pictures Shown In A Chart

Learning even just the basics of photography takes a bit of work and one of the more complex ideas is the relationship between ISO, aperture and shutter speed. Lifehack has a graphic that helps make sense of it.

The graphic does a reasonable job at explaining how the amount of light you let it affects a photo, how certain settings can increase noise, and how focus changes. The top represents aperture, the middle ISO, and the bottom different shutter speeds. It’s not a perfect representation of exactly what you’ll get, but it’s a nice visualisation that helps you understand the basics.

A Picture To Show You Clearly The Effects of Aperture, Shutter Speed and ISO On Images [Lifehack]


    • the top is aperture (focal distance), middle is shutter seed(Exposure time) and bottom is ISO (Sensor sensitivity, controls noise).

    • The ISO section in the graphic is the least helpful. It doesn’t show you that a higher ISO increases light sensitivity. Also, most modern cameras have a sweet spot for ISO around 400, and actually produce more noise at 100.

      • Can you reference this?

        My understanding is that digital noise is always proportional to ISO since it’s essential a processing issue … i.e. the sensor isn’t actually any more sensitive to light, but instead ISO setting just alters the acceptable signal gain required to create an image pixel. So more sensitive = higher likelihood of artefacts (i.e. visual grain).

        Much of this is also dependent on the size of the sensor’s pixel and the gaps between them – hence why full-frame sensors tolerate ISO better vs crop.

      • this is incorrect in my experience. best image quality on my last camera was on ISO 80

  • Top line = depth of field
    Second line = aperture
    third line = shutter speed
    Fourth line = iso/ noise control/ sensor sensitivity

  • The bottom graphic for ISO isn’t accurate and just shows the additional noise, not the light sensitivity gain from ISO increase.

    It should change from a darker to a lighter background, not the other way round. Same for the figures.

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