Cropping vs. moving closer vs. changing focal length

Started Oct 16, 2011 | Discussions thread
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Cropping vs. moving closer vs. changing focal length
Oct 16, 2011

I have a question. Let's say the same camera & lens is used for three different photos. F stop, ISO and shutter speed are the same for each photo (or are negligibly different).

  1. 1) the photographer sets the camera to 135 mm @ 14 MP. The photographer then crops the photo down such that it is now an 8 MP photo.

  1. 2) standing in the same position as photo #1, the photographer shoots the photo at 200 mm at 8 MP such that the field of vision is precisely the same as the now cropped first photo.

  1. 3) the photographer moves closer and shoots it at 135 mm & 8 MP, standing at a distance such that the field of vision will be precisely the same as #1 & #2.

Which of the three will be of the best quality and which will be of the lowest quality?

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