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 Pentax K20D
VS
Sensor area
369 mm²
K-m365 mm²
K20D- Area ratio
- 1.01:1
- Absolute difference
- 4 mm²
- Relative difference
- 1.1%
The K-m has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
Key specification differences
K-mMetricK20D
10.2 MPEffective pixels14.6 MP
23.5 × 15.7Sensor23.4 × 15.6
6.01 µmPixel pitch5 µm
36.17 µm²Pixel area25 µm²
2.76 MP/cm²Pixel density4 MP/cm²
1.53Crop factor1.54
—Maximum video—
590 gWeight800 g
SDHC, Secure DigitalStorageSDHC, Secure Digital
2 x AA Alkaline, Lithium or NiMH BatteriesBatteryLithium Ion (D-LI50)
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 has the larger sensor area. The K-m has the lighter body. The K20D has the higher effective resolution. The K-m and K20D were both released in 2008. Also consider the lens system and subjects you shoot.
Reasons to choose K20D
Released in 2008, K20D has about 365 mm² of sensor area, 14.6 MP effective resolution, and a 800 g body. Use these values to narrow the field, not as an overall image-quality score.