Reasons to choose EOS-1Ds Mark III
Released in 2007, EOS-1Ds Mark III has about 864 mm² of sensor area, 21.1 MP effective resolution, and a 1,385 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon EOS-1Ds Mark III
vs Nikon D300s
VS
Sensor area
864 mm²
EOS-1Ds Mark III373 mm²
D300s- Area ratio
- 2.32:1
- Absolute difference
- 491 mm²
- Relative difference
- 131.7%
The EOS-1Ds Mark III 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
EOS-1Ds Mark IIIMetricD300s
21.1 MPEffective pixels12.3 MP
36 × 24Sensor23.6 × 15.8
6.4 µmPixel pitch5.51 µm
40.95 µm²Pixel area30.32 µm²
2.44 MP/cm²Pixel density3.3 MP/cm²
1Crop factor1.52
—Maximum video—
1,385 gWeight938 g
CompactFlash type I, CompactFlash type II, Microdrive, SDHC Secure DigitalStorageCompactFlash type I, CompactFlash type II, Microdrive, SDHC Secure Digital
Lithium-Ion LP-E4 rechargeable battery Li-ion batteryBatteryLithium-Ion EN-EL3e rechargeable 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-1Ds Mark III has the larger sensor area. The D300s has the lighter body. The EOS-1Ds Mark III has the higher effective resolution. The D300s is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose D300s
Released in 2009, D300s has about 373 mm² of sensor area, 12.3 MP effective resolution, and a 938 g body. Use these values to narrow the field, not as an overall image-quality score.