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 K-x
VS
Sensor area
369 mm²
K-m373 mm²
K-x- Area ratio
- 1.01:1
- Absolute difference
- 4 mm²
- Relative difference
- 1.1%
The K-x has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
These cameras were released 1 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
K-mMetricK-x
10.2 MPEffective pixels12.4 MP
23.5 × 15.7Sensor23.6 × 15.8
6.01 µmPixel pitch5.48 µm
36.17 µm²Pixel area30.07 µm²
2.76 MP/cm²Pixel density3.33 MP/cm²
1.53Crop factor1.52
—Maximum video—
590 gWeight515 g
SDHC, Secure DigitalStorageSDHC, Secure Digital
2 x AA Alkaline, Lithium or NiMH BatteriesBattery4 x AA batteries (Lithium, Alkaline or Ni-MH)
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-x has the larger sensor area. The K-x has the lighter body. The K-x has the higher effective resolution. The K-x is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose K-x
Released in 2009, K-x has about 373 mm² of sensor area, 12.4 MP effective resolution, and a 515 g body. Use these values to narrow the field, not as an overall image-quality score.