Reasons to choose D7100
Released in 2013, D7100 has about 367 mm² of sensor area, 24.1 MP effective resolution, and a 675 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Nikon D7100
vs Sony Alpha SLT-A77
VS
Sensor area
367 mm²
D7100367 mm²
Alpha SLT-A77- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The D7100 and Alpha SLT-A77 have the same sensor area. Compare pixel density, sensor architecture, and release generation to understand likely image-quality differences.
These cameras were released 2 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
D7100MetricAlpha SLT-A77
24.1 MPEffective pixels24.3 MP
23.5 × 15.6Sensor23.5 × 15.6
3.9 µmPixel pitch3.88 µm
15.21 µm²Pixel area15.09 µm²
6.57 MP/cm²Pixel density6.63 MP/cm²
1.53Crop factor1.53
1,920 × 1,080Maximum video1,920 × 1,080
675 gWeight732 g
SD/SDHC/SDXC x 2StorageSD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo
Lithium-Ion EN-EL15 rechargeable battery Li-ion batteryBatteryRechargeable NP-FM500H battery
Amber marks the value that is generally preferable in this comparison context. It is not an overall camera score.
How to choose between these cameras
The D7100 and Alpha SLT-A77 have the same sensor area. The D7100 has the lighter body. The Alpha SLT-A77 has the higher effective resolution. The D7100 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Alpha SLT-A77
Released in 2011, Alpha SLT-A77 has about 367 mm² of sensor area, 24.3 MP effective resolution, and a 732 g body. Use these values to narrow the field, not as an overall image-quality score.