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-x
VS
Sensor area
365 mm²
K-7373 mm²
K-x- Area ratio
- 1.02:1
- Absolute difference
- 8 mm²
- Relative difference
- 2.1%
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.
Key specification differences
K-7MetricK-x
14.6 MPEffective pixels12.4 MP
23.4 × 15.6Sensor23.6 × 15.8
5 µmPixel pitch5.48 µm
25 µm²Pixel area30.07 µm²
4 MP/cm²Pixel density3.33 MP/cm²
1.54Crop factor1.52
—Maximum video—
750 gWeight515 g
SD/SDHC/MMCStorageSDHC, Secure Digital
Lithium-Ion D-LI90 rechargeable battery Li-ion batteryBattery4 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-7 has the higher effective resolution. The K-7 and K-x were both released in 2009. 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.