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EOS•DCS 1 Lenses: Lenses behave differently with the EOS•DCS 1 from a conventional EOS 35mm SLR. Although actual aperture values and focal lengths remain the same, the effective image area with the EOS•DCS 1 is only 18.4 mm x 27.6 mm compared to the conven- tional 35 mm format of 24 mm x 36 mm.
Since the EOS•DCS 1 image is smaller than a conventional 35 mm frame, it must be enlarged by approximately 25% to achieve the same output size (in terms of image height) on screen or on hard copy. Under this condition, the “effective” focal length of any lens used with the EOS•DCS 1 is approximately 1.3 times greater than when used with a conventional EOS 35 mm SLR. Use the following chart as a quick reference for effective focal lengths of EF lenses when used with the EOS•DCS 1.
NOTE: The EOS•DCS 1 is compatible with all Canon EF lenses (no restrictions).
This EF lens . . . |
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24 |
| 35 |
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20 | 28 |
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24 | 35 |
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30 |
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45 |
| . . . performs approximately like this lens. | ||||||||
