Canon eos5d manual Opening Ratio Conceptual Diagram, Sensor Comparison Chart

IV. PERFORMANCE AND RELIABILITY 22

Opening Ratio (Conceptual Diagram)

Photo diode area

Pixel size

EOS 5D Mark II	EOS 5D
(6.4 x 6.4µm)	(8.2 x 8.2µm)

advances and technology improvements to the sensor, plus countermeasures that help suppress noise from other camera circuits, are responsible for the sensor’s high signal to noise ratio, enabling higher ISO speeds and improved dynamic range at low ISOs. Those are impressive sensor improvements, considering that the original EOS 5D had larger 8.2µm pixels compared to 6.4µm pixels on the EOS 5D Mark II, and that pixel noise usually increases as size decreases.

Next, an optimized output amp with high-speed reading capability that is approximately 2.2 times faster than on the EOS 5D enables a faster burst mode of 3.9 fps (compared to 3.0 fps on the EOS 5D’s lower resolution 12.8-megapixel full-frame sensor) and makes it possible to readout a 30 fps HD video signal without overheating the sensor. The full-frame, 35mm “film” size of the EOS 5D Mark II’s sensor also maximizes the field of view of Canon’s EF lenses without adding the 1.6x lens crop factor found in APS-C sensor-based DSLRs. This is especially important when shooting with fisheye, ultra-wide, and wide-angle lenses, as it maintains the same field of view as those lenses have when mounted on conventional 35mm SLRs. It also improves depth-of-field control with normal lenses compared to APS-C sensor cameras, with dramatic DOF control when shooting HD video.

EOS 50D’s newly developed, 15.1-megapixel APS-C sized CMOS sensor: Even though the new EOS 50D doesn’t have the full-frame sensor of the EOS 5D Mark II, it benefits from numerous advances in sensor technology. Offering the highest performance to date of any APS-C sized imaging sensor, the new Canon-manufactured, 22.3mm x 14.9mm CMOS sensor found in the EOS 50D helps maintain a heritage of innovation and superior image quality found in all of its predecessors. It contains approximately 15.1 effective megapixels, gapless microlenses, improved

			noise reduction, and a Live View silent shooting mode with electronic 1st curtain
EOS 50D CMOS Sensor
			shutter. As with the EOS 40D, the sensor size creates a lens crop factor of 1.6x
			for all Canon EF and EF-S lenses.
14.9mm	28.0mm	Sensor Comparison Chart
			Specification	EOS 50D		EOS 40D
			Effective pixels	Approx. 15.10 million		Approx. 10.10 million
				(4752 x 3168)		(3904 x 2598)
			Total pixels	Approx. 15.50 million		Approx. 10.50 million
				(4848 x 3204)		(3996 x 2620)
22.3mm			Effective sensor size [mm]	22.3 x 14.9		22.2 x 14.8
42.0mm			Pixel size [µm]	4.7		5.7
			Color filter	RGB primary color filter
			Aspect ratio		3:2