Here's my attempt at visualizing the actual affect of the .6X crop factor in the 10D vs. a 35mm or full frame sensor.
Area bounded by the black circle represents the image as the lens records it. The red rectangle bounds an area equal to the image as seen by a 35mm film or FFS digital camera. The blue rectangle represents the image area recorded on the 10D sensor. There is no magnification; it's just a smaller portion of the same image. The rectangles are 'more or less' to scale, and are in the proper proportion. To me, they are pretty illustrative of the effect.
I've taken some liberties here, and if any of you think I've misrepresented the effect or if this is not helpful to those who are having trouble with the concept, I'll happily remove or modify this picture.
|IMAGE IS A REDIRECT OR MISSING!|
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