- Medium format 1,452.0mm2
- 40.0 megapixels
- ISO 200 - 1000
- Go in depth with our full Pentax 645D Review.
- See real-world photos taken with the 645D.
- APS-C 369.7mm2
- 24.3 megapixels
- ISO 100 - 16,000
- Go in depth with our full Sony A77 Review.
- See real-world photos taken with the A77.
- Succeeded by the Pentax 645Z
- Compare 645D vs 645Z
- Succeeded by the Sony A77 II
- Compare A77 vs A77 II
- Compare PENTAX 645Z vs SONY A77 II