Nikon D90 vs Nikon D3100 - Cameras Specs Comparison

Top Eleven Reasons for the Nikon D90 vs. Nikon D3100: 1. Larger sensor, 2. Plenty lower noise at high ISO, 3. Noticeably better image quality ... 48 Larger sensor 15.8 x 23.6 mm vs 15.4 x 23.1 mm 15.8 x 23.6 mm vs 15.4 x 23.1 mm— 4.82% larger sensor.

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