Reasons to choose D90
Released in 2008, D90 has about 373 mm² of sensor area, 12.3 MP effective resolution, and a 703 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Nikon D90
vs Sony Alpha DSLR-A100
VS
Sensor area
373 mm²
D90373 mm²
Alpha DSLR-A100- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The D90 and Alpha DSLR-A100 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
D90MetricAlpha DSLR-A100
12.3 MPEffective pixels10 MP
23.6 × 15.8Sensor23.6 × 15.8
5.51 µmPixel pitch6.11 µm
30.32 µm²Pixel area37.29 µm²
3.3 MP/cm²Pixel density2.68 MP/cm²
1.52Crop factor1.52
1,280 × 720Maximum video—
703 gWeight638 g
SD/SDHCStorageCompact Flash (Type I or II)
Lithium-Ion EN-EL3e rechargeable battery Li-ion batteryBatteryLithium-Ion (NP-FM55H) Li-ion 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 D90 and Alpha DSLR-A100 have the same sensor area. The Alpha DSLR-A100 has the lighter body. The D90 has the higher effective resolution. The D90 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Alpha DSLR-A100
Released in 2006, Alpha DSLR-A100 has about 373 mm² of sensor area, 10 MP effective resolution, and a 638 g body. Use these values to narrow the field, not as an overall image-quality score.