What is the Difference Between Nikon D5100 and D3100?

The Nikon D3100 and D5100 are both DSLR cameras with some differences in terms of sensor, ISO range, and features. Here are the main differences between the two models:

1. Sensor: The Nikon D3100 has a 14.2-megapixel APS-C (23.1 x 15.4 mm) sized CMOS sensor, while the Nikon D5100 has a slightly larger 16.1-megapixel APS-C (23.6 x 15.6 mm) sensor.
2. ISO Range: The Nikon D5100's sensor has a broader ISO range from ISO 100 to 6400, which can be boosted all the way up to 25,600, while the Nikon D3100 has a range from ISO 100 to 3200 and can be boosted up to 12,800. The high ISO performance on the Nikon D5100 is also better.
3. Dynamic Range: The Nikon D5100 has a better dynamic range than the Nikon D3100, according to DxOMark.com.
4. Color Depth: The Nikon D5100 records twice more colors than the D3100 in RAW (14-bit versus 12-bit).
5. Weight: The Nikon D3100 is approximately 55 grams lighter than the D5100.
6. Autofocus System: Both cameras have the same 11 focus point autofocus system with 1 cross-type sensor, and both do not have focus motors, which means they will not autofocus with older non-AF-S lenses.
7. Battery: Both cameras use the same EN-EL14 battery, but the D5100 is more efficient and takes up to 660 shots on a single charge, compared to 550 on the D3100.
8. Display: The Nikon D5100 has a flip-out screen, which is not present on the D3100.
9. Classification: The Nikon D3100 is classified as an entry-level DSLR, while the Nikon D5100 is considered a step up with more features and better sensor technology.

In summary, the Nikon D5100 offers a more advanced sensor, better high ISO performance, and a higher-resolution flip-out screen, among other features. However, the Nikon D3100 is still a capable entry-level DSLR for those looking for a more budget-friendly option.

Comparative Table: Nikon D5100 vs D3100

Here is a table comparing the key differences between the Nikon D5100 and D3100:

Both cameras share the same camera lens mount (Nikon F mount) and have a standard sensitivity range of ISO 100 - 6400, expandable to 25600 in the D5100. The D5100 has a slightly larger sensor and higher resolution, as well as improved video capabilities and an articulated LCD screen. Additionally, the D5100 allows for exposure bracketing up to 3 frames and accommodates external microphone input.