Lens Focal Length Conversion table:
We calculated the resulting focal length when using the Extender EF1.4x II or Life Size converter EF and the Canon EOS 300D which has a crop factor of 1.6x.
Normal focal length | Extender EF1.4x II or Life Size converter EF + AF (Y/N) | 300D crop factor (1.6x) | EF1.4x I or Life Size EF + 1.6x crop factor |
EF17-40 f/4L USM | X (N) | EF27-64 f/4 L USM | X (N) |
EF50 f/2.5 Compact Macro | EF70 f/3.5 Compact Macro(Y) | EF80 f/2.5 Compact Macro | EF112 f/3.5 Compact Macro (Y) |
EF70-200 f/4L USM | EF98-280 f/5.6L USM (Y) | EF112-320 f/4 L USM | EF156.8-448 f/5.6L USM (Y) |
EF28-105 f/3.5-4.5 USM | X (N) | EF44.8-168 f/3.5-4.5 USM | X (N) |
EF 28-135 f/4.5-5.6 IS USM | X (N) | EF44.8-216 f/4.5-5.6 IS USM | X (N) |
EF35-350 f/4.5-5.6L USM | X (N) | EF56-560 f/4.5-5.6L USM | X (N) |
EF300 f/4L IS USM | EF420 f/5.6L IS USM | EF480 f/4L IS USM | EF672 f/5.6L IS USM |
EF100-400 f/4.5-5.6L IS USM | EF140-560 f/6.7-8L IS (N*+) | EF460-640 f/4.5-5.6L IS USM | EF224-896 f/6.7-8L IS (N*+) |
EF400 f/5.6L USM | EF560 f/8L (N*) | EF640 f/5.6L USM | EF896 f/8L (N*) |
Cosina EF19-35 f/3.5-4.5 | X (N) | Cosina EF30-56 f/3.5-4.5 | X (N) |
Sigma 75-300 f/4.5-5.6 DL | X (N) | Sigma 120-480 f/4.5-5.6 DL | X (N) |
EF28-80 f/3.5-5.6 III USM | X (N) | EF44.8-128 f/3.5-5.6 III USM | X (N) |
EF-S18-55 f/3.5-5.6 | X (N) | EF-S29-88 f/3.5-5.6 | X (N) |
EF75-300 f/4-5.6 III USM | X (N) | EF120-480 f/4-5.6 III USM | X (N) |
*With the EOS-1v and EOS-3, AF is possible with
the centre focusing point.
+The Image Stabilizer does not operate with the following cameras: EOS 650, 620,
630/600, RT, 700, 750, 850, EOS-1, A2/A2E, 10s, Elan, Rebel/Rebel S, Rebel
II/Rebel SII.
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