ISO 100 appears slightly grainier than ISO 200
ISO 200 is sharp and noise-free
Even when viewed at 100% ISO 400 looks sharp and detailed with minimal noise
However, as is often the case with compact sensors, ISO 800 is the tipping point where noise becomes visible
Image noise at ISO 1600, by contrast, is very well controlled
Alas, by ISO 3200 the image has degraded with soft edges and less detail
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