beez Posted February 6, 2017 Share #21 Posted February 6, 2017 Advertisement (gone after registration) Do remember, it's still a 28mm lens on the Q, and the internal cropping bars to not change the lens' optics. If you fill the frame with someone's face, even using the cropping for the 50mm field of view, you're still going to have a fairly distorted face as the outcome. The cropping bars serve as a visual reminder that crops out the parts of the frame that will have the most distortion - there's no optical magic to the cropping bars. Link to post Share on other sites More sharing options...
Advertisement Posted February 6, 2017 Posted February 6, 2017 Hi beez, Take a look here Future Leica Owner: Comparing a few aspects to the TL. I'm sure you'll find what you were looking for!
ramarren Posted February 6, 2017 Share #22 Posted February 6, 2017 Do remember, it's still a 28mm lens on the Q, and the internal cropping bars to not change the lens' optics. If you fill the frame with someone's face, even using the cropping for the 50mm field of view, you're still going to have a fairly distorted face as the outcome. The cropping bars serve as a visual reminder that crops out the parts of the frame that will have the most distortion - there's no optical magic to the cropping bars. Focal length makes no difference at all when it comes to perpective distortion. The only thing that matters in controlling perspective distortion is subject to lens distance. Focal length plus format defines the combined horizontal and vertical angle of view, or field of view. A short focal length lens on the same format as a longer focal length lens presents a wider field of view. Approaching the edges of the frame with a wide field of view produces 'wide angle distortion' due to the geometry of a planar projection of a three dimensional world ... not because of the distance or the focal length. When you crop the field of view of a short focal length lens to simulate a longer focal length lens on the same format, the results will look IDENTICAL to the results from that longer focal lengths lens in terms of perspective and wide angle distortion. I learned this from the book Basic Photography published by Focal Press when I was in my teens (1960s). I have the 1958 edition, but it was printed over many many years of editions with very few changes because the principles of basic photography are, well, basic and don't change very much. Link to post Share on other sites More sharing options...
Mr.Q Posted February 6, 2017 Share #23 Posted February 6, 2017 Do remember, it's still a 28mm lens on the Q, and the internal cropping bars to not change the lens' optics. If you fill the frame with someone's face, even using the cropping for the 50mm field of view, you're still going to have a fairly distorted face as the outcome. The cropping bars serve as a visual reminder that crops out the parts of the frame that will have the most distortion - there's no optical magic to the cropping bars. This is incorrect. As mentioned above, the focal length of a lens does not determine perspective distortion. Link to post Share on other sites More sharing options...
Wednesday Campanella Posted February 7, 2017 Author Share #24 Posted February 7, 2017 Thank you again everyone for the great info. Much appreciated. Link to post Share on other sites More sharing options...
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