Reasons to choose K-m
Released in 2008, K-m has about 369 mm² of sensor area, 10.2 MP effective resolution, and a 590 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Pentax K-m
vs Sony Alpha DSLR-A290
VS
Sensor area
369 mm²
K-m369 mm²
Alpha DSLR-A290- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The K-m and Alpha DSLR-A290 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
K-mMetricAlpha DSLR-A290
10.2 MPEffective pixels14.2 MP
23.5 × 15.7Sensor23.5 × 15.7
6.01 µmPixel pitch5.1 µm
36.17 µm²Pixel area25.98 µm²
2.76 MP/cm²Pixel density3.85 MP/cm²
1.53Crop factor1.53
—Maximum video—
590 gWeight549 g
SDHC, Secure DigitalStorageMemory Stick Pro Duo/ Pro-HG Duo, SD/SDHC
2 x AA Alkaline, Lithium or NiMH BatteriesBatteryLithium-Ion NP-FH50 rechargeable battery 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 K-m and Alpha DSLR-A290 have the same sensor area. The Alpha DSLR-A290 has the lighter body. The Alpha DSLR-A290 has the higher effective resolution. The Alpha DSLR-A290 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Alpha DSLR-A290
Released in 2010, Alpha DSLR-A290 has about 369 mm² of sensor area, 14.2 MP effective resolution, and a 549 g body. Use these values to narrow the field, not as an overall image-quality score.