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Is the view/capture area of image from any camera with same lens (say 50mm) change when going from a full frame to a medium frame type camera?
Yes. The larger the format, the wider the view.
The Pentax 645D, for example, has approximately a 0.78x crop factor. So a 50mm lens on a 645D would give a field of view similar to a 39mm lens--assuming the 50mm lens's image circle can cover the entire sensor of the 645D.
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