Does the Canon EOS M use the same 1.6x crop factor as Canon APS-C DSLRs?
Asked 9/7/2012
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I'm considering a Canon EOS M for hiking and want to understand how focal length and field of view compare.
If I mount a Canon EF-S 18-55mm lens from a 550D/600D onto an EOS M using the EF adapter, will it give the same angle of view as the EOS M 18-55mm STM IS kit lens at the same marked focal length, such as 18mm?
Also, is 18mm on the EOS M the same view as 18mm on Canon APS-C DSLR bodies, or are different conversion rules used? I understand the difference between full frame and 1.6x crop cameras, but I'm not sure where the EOS M fits.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
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It's 1.6 for EOS M - it is based on sensor size and EF adaptor makes EF lenses work the same as for DSLR APS-C cameras. Even though EF M lenses are mounted closer to sensor, they are still marked standard way (with regard to correctly estimate field of depth) so it finally comes to sensor size alone.
Originally by user11498. Source · Licensed CC BY-SA 4.0
user11498
13y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. The EOS M uses a Canon APS-C sensor, so it has the same 1.6x crop factor as Canon APS-C DSLRs such as the 550D and 600D.
That means:
- An EF-S 18-55mm lens on an EOS M via the adapter gives the same angle of view as an EF-M 18-55mm lens on the EOS M at the same focal length.
- 18mm on an EOS M looks the same as 18mm on a Canon APS-C DSLR, assuming the same shooting position.
The adapter does not change focal length or crop factor. It only allows the lens to mount correctly. Field of view is determined by the lens focal length and the sensor size.
Compared with full frame, you still apply the usual 1.6x crop rule: 18mm on EOS M gives a full-frame-equivalent field of view similar to about 29mm.
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