An oldie, but a goodie, that I saw on Planet5D Blog: The difference between the full frame and crop sensors.
Since I am getting a Canon 550D in a few days, I though that I needed to watch this.
One of the most important things to consider with HDSLRs is Lens selection – especially when working with a crop sensor as the 550D has.
Now, I guess, that most people who have a 550D or any crop sensor camera would want to replace the body in the furture with, most possibly, a camera with full frame sensor.
This video illustrates the difference that senor makes on the image with the lenses. It is important to know that lenses designed for full frame will have a narrower angle on a crop sensor and a lens for a crop sensor camera will be blurred on the edges when used on a full frame camera.
So the best idea would be to stick to the non crop lenses and just adjust your choices.
A 50mm on a 550D would actually be an 80mm.
The 550D applies a 1.6 multiplier on the focal length. Here is a great Focal Length Multiplier Calculator.
This is a short test with the tripod in the same spot switching between prime lenses to show how the crop affects the 7D. The subject, ace stand in Chris Clement, was roughly five feet from the camera. This isn’t meant to be an aesthetic test to show the difference in image quality between the two cameras. It’s a down and dirty field guide for myself and the other shooters we work with so we can quickly figure what lens we want to use on each camera.
We go from 20mm all the way to 100mm with a Lensbaby composer thrown in at the very end.