Reasons to choose K-1
Released in 2016, K-1 has about 862 mm² of sensor area, 36.4 MP effective resolution, and a 1,010 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Pentax K-1
vs Sony Alpha a7R III
VS
Sensor area
862 mm²
K-1862 mm²
Alpha a7R III- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The K-1 and Alpha a7R III have the same sensor area. Compare pixel density, sensor architecture, and release generation to understand likely image-quality differences.
These cameras were released 1 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
K-1MetricAlpha a7R III
36.4 MPEffective pixels42.4 MP
35.9 × 24Sensor35.9 × 24
4.87 µmPixel pitch4.51 µm
23.67 µm²Pixel area20.32 µm²
4.22 MP/cm²Pixel density4.92 MP/cm²
1Crop factor1
1,920 × 1,080Maximum video3,840 × 2,160
1,010 gWeight657 g
SD/SDHC/SDXC (UHS-I)StorageSD/SDHC/SDXC/MS PRO Duo
D-LI90 lithium-ion battery Li-ion batteryBatteryNP-FZ100 lithium-ion battery Li-ion 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-1 and Alpha a7R III have the same sensor area. The Alpha a7R III has the lighter body. The Alpha a7R III has the higher effective resolution. The Alpha a7R III is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Alpha a7R III
Released in 2017, Alpha a7R III has about 862 mm² of sensor area, 42.4 MP effective resolution, and a 657 g body. Use these values to narrow the field, not as an overall image-quality score.