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