EF-S Lenses

Started Mar 21, 2012 | Discussions thread
willhall
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Re: EF-S Lenses
In reply to cuban pab, Mar 21, 2012

There are two types of sensor used by canon, 'full frame' and 'crop'. The full frame sensors are larger and currently used in some of the 1Ds series, 5D series and 1Dx bodies. All other bodies use the smaller crop sensor.

On the bodies with the crop sensor, the mirror box is a little smaller, so parts of the lens can be a little closer to the sensor. This feature is present in the EF-S lenses, in addition to them projecting an image onto a smaller area (large enough to cover the crop sensor, but generally not enough to cover the full frame sensor)

EF lenses are of course the opposite, covering a larger sensor area, and with lens elements slightly further from the sensor.

All current canon bodies can accept any EF lens (which have been made for the past 25 years and are also available from third partys such as sigma, tokina...) but the bodies with crop sensors (since 2003) can also accept EF-S lenses.

This is slightly complicated by the 1D series of bodies which has a sensor size between the other two and only accepts EF lenses.
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-Will
- http://lifeinmegapixels.com

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Canon EOS 500D Canon EOS 60D Canon EF 50mm f/1.8 II Canon EF-S 55-250mm f/4-5.6 IS Canon EF-S 18-55mm f/3.5-5.6 IS +2 more
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