Lenses for crop sensor cameras

By now you should be well acquainted with the idea that different cameras can…have different sized sensors.…But if you use an SLR with a cropped sensor, that is, one whose sensor is…smaller than a piece of 35mm film, then you have some additional lens options.…Take a look at this.…I have got here a Canon 5D, which has a full frame sensor, and a Canon 7D,…which has a cropped sensor with a crop factor of 1.6, just like we were…talking about earlier.…I have taken the lenses off so that you can see inside to see the mirror chambers.…

Now, we haven't talked about SLR anatomy. You can learn about that in…the exposure course.…But inside this chamber, when I take the lens off, there is mirror that reflects…light up into the viewfinder and you can see very easily that the full frame…sensor has a much larger mirror than the camera with the crop sensor.…That's because the sensor is so much larger that it takes a bigger mirror to cover it up.…Now, what you can't see here from this angle is that the mirror in this camera…