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ISO settings have a direct influence on the amplifier before the analogue-to-digital converter (ADC): high ISO numbers give more amplification, while low ISO numbers give less amplification. The camera sensor itself always maintains the same degree of sensitivity; only the level of amplification changes. Depending on lighting conditions, the ISO setting will either be selected automatically by the camera or can be changed manually.
Camera |
Sensitivity [ISO] | Colour depht (Bit) |
Nikon D3x |
100 - 1.600 |
42 |
Nikon D3s |
200 - 12.800 |
42 |
Nikon D4 | 100 - 12.800 | 42 |
Nikon D800 | 100 - 6.400 | 42 |
Canon EOS 600D |
100 - 6.400 |
42 |
Canon EOS 60D |
100 - 3.200 |
42 |
Canon EOS 1D X |
100 - 51.200 |
42 |
Canon EOS 1D Mark IV |
100 - 12.800 |
42 |
Canon EOS 5D Mark III | 100 - 12.800 | 42 |
Canon EOS 650D | 100 - 6.400 | 42 |
Olympus E5 |
100 - 6.400 |
36 |
The ISO value indicates a camera sensor’s sensitivity to light. The lower the ISO number, the less sensitive the sensor is to light. High ISO settings allow quality images to be taken even when light conditions are poor. However, the drawback of increased light sensitivity is an increase in noise: the image becomes grainy and lacks detail. Therefore, it is only advisable to select high ISO numbers when using high-quality camera sensors, with high colour depth and a large signal-to-noise ratio.
Update: 06.07.2012
Sony Alpha 9 / Canon EOS R with Canon Adapter EF-EOS R / Sony Alpha 7S II / Sony Alpha 7R III / Nikon Z6 with F-Mount Adapter FTZ / Sony Alpha 7R II / Nikon Z7 with F-Mount Adapter FTZ / Sony Alpha 7S / Nikon D850 / Canon EOS 1D X Mark II / Sony Alpha 7III / Nikon D5 / Canon EOS 1D X / Nikon D4s / Canon EOS 5D Mark IV / Nikon D4 / Nikon D750 / Canon EOS 6D Mark II / Sony Alpha 6300 / Sony Alpha 6500 / Nikon D500 / Nikon D810 / Nikon D800 / Nikon D800E / Nikon Df / Panasonic Lumix DC-G9 / Nikon D610 / Nikon D600 / Canon EOS M50 / Canon EOS 6D / Sony Alpha 99 II (SLT-A99 II) / Canon EOS 5DS R ( without low-pass filter) / Olympus OM-D E-M1 Mark II / Canon EOS 80D / Canon EOS 5DS / Sony Alpha 77 II / Canon EOS 70D / Nikon D7200 / Pentax K-1 Mark II / Canon EOS 200D / Canon EOS 800D / Rebel T7i /
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