Reasons to choose EOS 20Da
Released in 2005, EOS 20Da has about 338 mm² of sensor area, 8.2 MP effective resolution, and a 770 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon EOS 20Da
vs Canon EOS 450D
VS
Sensor area
338 mm²
EOS 20Da329 mm²
EOS 450D- Area ratio
- 1.03:1
- Absolute difference
- 9 mm²
- Relative difference
- 2.7%
The EOS 20Da 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 3 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
EOS 20DaMetricEOS 450D
8.2 MPEffective pixels12.2 MP
22.5 × 15Sensor22.2 × 14.8
6.42 µmPixel pitch5.19 µm
41.16 µm²Pixel area26.93 µm²
2.43 MP/cm²Pixel density3.71 MP/cm²
1.6Crop factor1.62
—Maximum video—
770 gWeight524 g
CompactFlash type I, CompactFlash type II, MicrodriveStorageSDHC, Secure Digital
Lithium-Ion BP-511A rechargeable battery Li-ion batteryBatteryNB-4L Li-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 EOS 20Da has the larger sensor area. The EOS 450D has the lighter body. The EOS 450D has the higher effective resolution. The EOS 450D is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose EOS 450D
Released in 2008, EOS 450D has about 329 mm² of sensor area, 12.2 MP effective resolution, and a 524 g body. Use these values to narrow the field, not as an overall image-quality score.