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The Olympus E-410 offers four different Noise Filter settings: Off, Low, Standard and High. Standard is the default setting, so that's what we've used in the comparisons against the Canon EOS 400D / XTi above. To see how the E-410 handles the same subject matter with different Noise Filter settings though, we shot the same scene as above using each of them - and at each ISO - and presented 100% crops below.
As you'd expect, evidence of noise speckles are higher with the lower Noise Filter settings, and detail becomes more smeared-out at the higher Noise Filter settings. No surprise there, but we'd say Olympus has probably gone for a bit too much noise reduction for its default setting. There's lots more detail visible with the Noise Filter set to Low and little additional noise to worry about - this would be our preferred setting for JPEGs processed in-camera. That said, if we were reducing noise with software later, we'd argue the first vertical column of crops with the Noise Filter Off are actually the best starting point in terms of maximum detail captured.
Note: one final observation is the E-410 does not appear to double its actual sensitivity when the ISO value is doubled. Our exposure at 100 ISO for both the E-410 and Canon 400D / XTi samples was 1/250; therefore the exposures at 200, 400, 800 and 1600 ISO should have been 1/500, 1/1000, 1/2000 and 1/4000 respectively. These were indeed the exposures for the Canon, but instead the E-410 increased its exposures by slightly smaller steps: at 200, 400, 800 and 1600 ISO, it metered 1/400, 1/640, 1/1250 and 1/2500 respectively. So while the jump from 400 to 800 ISO and 800 to 1600 ISO did show a halving of the shutter speed, the differences between 100 and 200 ISO and 200 to 400 ISO are closer to 2/3EV. We don't see this as a fault in the E-410's metering, as the image brightness appears consistent across the ISO range, but just don't assume doubling the ISO will consistently halve your shutter speed.
Olympus E-410 Noise Filter: Off |
Olympus E-410 Noise Filter: Low |
Olympus E-410 Noise Filter: Standard |
Olympus E-410 Noise Filter: High |
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100 ISO |
100 ISO |
100 ISO |
100 ISO |
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200 ISO |
200 ISO |
200 ISO |
200 ISO |
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400 ISO |
400 ISO |
400 ISO |
400 ISO |
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800 ISO |
800 ISO |
800 ISO |
800 ISO |
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1600 ISO |
1600 ISO |
1600 ISO |
1600 ISO |
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