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.
Side-by-side comparison
Pentax K-x
vs Sony Alpha SLT-A35
VS
Sensor area
373 mm²
K-x367 mm²
Alpha SLT-A35- Area ratio
- 1.02:1
- Absolute difference
- 6 mm²
- Relative difference
- 1.7%
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 2 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
K-xMetricAlpha SLT-A35
12.4 MPEffective pixels16.2 MP
23.6 × 15.8Sensor23.5 × 15.6
5.48 µmPixel pitch4.76 µm
30.07 µm²Pixel area22.63 µm²
3.33 MP/cm²Pixel density4.42 MP/cm²
1.52Crop factor1.53
—Maximum video—
515 gWeight415 g
SDHC, Secure DigitalStorageSD/SDHC/SDXC/Memory Stick Pro Duo/ Pro-HG Duo
4 x AA batteries (Lithium, Alkaline or Ni-MH)BatteryRechargeable NP-FW50 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-x has the larger sensor area. The Alpha SLT-A35 has the lighter body. The Alpha SLT-A35 has the higher effective resolution. The Alpha SLT-A35 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Alpha SLT-A35
Released in 2011, Alpha SLT-A35 has about 367 mm² of sensor area, 16.2 MP effective resolution, and a 415 g body. Use these values to narrow the field, not as an overall image-quality score.