New To Photography:Focal Length vs Crop Factor

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This page is a chapter in the book Appendix D - Full Frame vs APS-C/DX crop factor w/example.
This diagram shows that focal length of a lens does not change but the field of view does change with a cropped sensor.



This link gives an very very detailed explanation of the issue of equivalent focal length etc on a cropped sensor vs a 35mm sensor.
Previous: New To Photography:Full Frame vs APS-C/DX crop factor w/example Appendix D - Full Frame vs APS-C/DX crop factor w/example Next: New To Photography:Appendix E - How to obtain tack sharp images

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