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ISO Sensitivity / Noise levels (contd.)

Noise filter settings

The graph below shows the effect of setting the Noise Filter to any one of the four levels at ISO 100 (125 equiv.), ISO 400 and ISO 1600 (1250 equiv.). The 'jump' between Off and Low is considerably more than from Low to Standard, hence if you feel you need to use some Noise Filter then it's probably worth sticking to the 'Low' setting. The graph shows gray luminance but it is a similar picture for chroma noise.

Below are the crops for the graph data above. It is worth noting that while its predecessor clearly still applied some noise reduction at ISO 1600 (1250 equiv.) even at the 'Off' setting, on the E-420 'Off' now actually means something much closer to 'Off'.

ISO 100
Noise filter: Off
ISO 400
Noise filter: Off
ISO 800
Noise filter: Off
ISO 1600
Noise filter: Off
ISO 100
Noise filter: Low
ISO 400
Noise filter: Low
ISO 800
Noise filter: Low
ISO 1600
Noise filter: Low
ISO 100
Noise filter: Standard
ISO 400
Noise filter: Standard
ISO 800
Noise filter: Standard
ISO 1600
Noise filter: Standard
ISO 100
Noise filter: High
ISO 400
Noise filter: High
ISO
Noise filter: High
ISO 1600
Noise filter: High
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