What is the crop factor of the Canon 1D?

The Canon EOS-1D is equipped with an APS-H sensor, whose diagonal measures 34.5mm. The sensor has a crop factor (or format factor, or focal length multiplier) of 1.3.

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 1.3, the sensor in the Canon 1D is smaller than the receptor area of a 35mm film slide or negative. As a result, a lens that is attached to the Canon 1D 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 38mm lens on the Canon 1D will provide the same angle of view and depth of field as a 50mm normal lens on a film camera (38mm * 1.3 = 50mm).

Sensor specs and performance

The table below compares the sensor specs of the Canon 1D 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 1D	APS-H	4.1	2496	1662	none	..	..	..	..
2.		Canon 1D Mark II	APS-H	8.2	3504	2336	none	22.3	11.1	1003	66
3.		Canon 1D Mark II N	APS-H	8.2	3504	2336	none	22.3	11.2	975	66
4.		Canon 1Ds	Full Frame	11.0	4064	2704	none	21.8	11.0	954	63
5.		Canon 1Ds Mark III	Full Frame	21.0	5616	3744	none	24.0	12.0	1663	80
6.		Canon 1D C	Full Frame	17.9	5184	3456	4K/24p	24.3	13.0	2155	85
7.		Canon 1D X	Full Frame	17.9	5184	3456	1080/30p	23.8	11.8	2786	82
8.		Canon 1D X Mark II	Full Frame	20.0	5472	3648	4K/60p	24.1	13.5	3207	88
9.		Canon 1D X Mark III	Full Frame	20.0	5472	3648	4K/60p	24.2	14.5	3248	91
10.		Canon 5D Mark IV	Full Frame	30.1	6720	4480	4K/30p	24.8	13.6	2995	91
11.		Canon 5DS	Full Frame	50.3	8688	5792	1080/30p	24.7	12.4	2381	87
Note: DXO values in italics represent estimates based on sensor size and age.

In the United States, the 1D was initially launched in September 2001 at a price of $6,499.

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Camera to camera comparisons

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