What is the crop factor of the Canon Rebel?

The Canon EOS Digital Rebel is equipped with an APS-C sensor, whose diagonal measures 27.3mm. The sensor has a crop factor (or format factor, or focal length multiplier) of 1.6.

The crop factor is defined as the ratio of the 35mm full-frame film diagonal to the diagonal of a digital sensor. This number indicates how a lens behaves in relation to the size of the image sensor.

Sensor size comparison with a film slide

With a crop factor of 1.6, the sensor in the Canon Rebel is smaller than the receptor area of a 35mm film slide or negative. As a result, a lens that is attached to the Canon Rebel will offer a narrower angle of view and provide deeper depth of field than a lens of similar focal length and aperture on a film camera. The equivalent focal length is obtained by multiplying the actual focal length of the lens with the crop factor. For example, a 31mm lens on the Canon Rebel will provide the same angle of view and depth of field as a 50mm normal lens on a film camera (31mm * 1.6 = 50mm).

Sensor specs and performance

The table below compares the sensor specs of the Canon Rebel to those of several similar cameras. The reported DXO values are indicators of the sensor's imaging quality (higher is better), covering color depth (DXO Portrait), dynamic range (DXO Landscape), and high-ISO noise (DXO Sports). Larger sensor cameras tend to outperform cameras of the same generation that are equipped with a smaller imager. On the other hand, larger sensors are more expensive and require bigger and heavier lenses than smaller light receptors.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Canon Rebel	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
2.		Canon 10D	APS-C	6.3	3072	2048	none	21.1	10.9	571	57
3.		Canon 20D	APS-C	8.2	3504	2336	none	21.9	11.0	721	62
4.		Canon T1i	APS-C	15.1	4752	3168	1080/20p	21.7	11.5	663	63
5.		Canon T3i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
6.		Canon T4i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
7.		Canon T6s	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
8.		Canon T7i	APS-C	24.0	6000	4000	1080/60p	23.7	13.1	1586	80
9.		Canon XT	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
10.		Canon XTi	APS-C	10.1	3888	2592	none	22.1	11.0	664	62
11.		Nikon D70	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
Note: DXO values in italics represent estimates based on sensor size and age.

In the United States, the Rebel was initially launched in August 2003 at a price of $899.

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Camera to camera comparisons

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