Hello, I have a Canon 40D



I have a Canon 40D and it came with software that allows you to bring the view finder to the computer screen via USB. From there, you could just use a screen capture program like Camtasia to make a video of that. Not sure if that is exactly what you were looking for and of course, you would have to always have a computer attached to the camera which might be cumbersome out in the field but that is one idea.

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