Reasons to choose K-7
Released in 2009, K-7 has about 365 mm² of sensor area, 14.6 MP effective resolution, and a 750 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Pentax K-7
vs Pentax K-m
VS
Sensor area
365 mm²
K-7369 mm²
K-m- 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.
These cameras were released 1 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
K-7MetricK-m
14.6 MPEffective pixels10.2 MP
23.4 × 15.6Sensor23.5 × 15.7
5 µmPixel pitch6.01 µm
25 µm²Pixel area36.17 µm²
4 MP/cm²Pixel density2.76 MP/cm²
1.54Crop factor1.53
—Maximum video—
750 gWeight590 g
SD/SDHC/MMCStorageSDHC, Secure Digital
Lithium-Ion D-LI90 rechargeable battery Li-ion batteryBattery2 x AA Alkaline, Lithium or NiMH Batteries
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 K-7 has the higher effective resolution. The K-7 is the newer release. Also consider the lens system and subjects you shoot.
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.