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]


    Well, I suppose the middle is shutter speed and the bottom line is exposure.

      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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