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Specifications A-7
EOS
•
DCS 3 Lenses: Lenses behave differently with the EOS
•
DCS 3
from a conventional EOS 35mm SLR. Although actual aperture values
and focal lengths remain the same, the effective image area with the
EOS
•
DCS 3 is only 16.4 mm x 20.5 mm compared to the conven-
tional 35 mm format of 24 mm x 36 mm.
Since the EOS
•
DCS 3 image is smaller than a conventional 35 mm
frame, it must be enlarged by approximately 50% 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 3 is approximately 1.5 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 3.
NOTE: The EOS
•
DCS 3 is compatible with all Canon EF lenses (no restrictions).
This EF lens . . .
. . . performs approximately like this lens.
20
24
28
35
50 100 200
5035
45
70 135
135
200
70 90
100 300