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Photography Q&A
Different focal length chart
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<blockquote data-quote="BackdoorArts" data-source="post: 537612" data-attributes="member: 9240"><p>I was with you until you added the last two lines. The focal lengths are not meaningless because I could put <em>whatever</em> lens took the original shot (assuming it's 14-16mm) on <em>any</em> camera and taken that first image. The focal lengths are <em>the only consistent thing</em> in the images because, a) it does not speak to absolute field of view (what we see are relative changes in field of view), and b) there are no distances to subject matter listed. </p><p></p><p>Theoretically I could have started with the same initial 14-16mm lens and, moving forward/backward along the line of incidence perpendicular to the sensor, taken the <em>exact same image with any other camera</em>. It's only when you speak of field of view and distance to subject does focal length require the further factor of sensor size to be understood.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 537612, member: 9240"] I was with you until you added the last two lines. The focal lengths are not meaningless because I could put [I]whatever[/I] lens took the original shot (assuming it's 14-16mm) on [I]any[/I] camera and taken that first image. The focal lengths are [I]the only consistent thing[/I] in the images because, a) it does not speak to absolute field of view (what we see are relative changes in field of view), and b) there are no distances to subject matter listed. Theoretically I could have started with the same initial 14-16mm lens and, moving forward/backward along the line of incidence perpendicular to the sensor, taken the [I]exact same image with any other camera[/I]. It's only when you speak of field of view and distance to subject does focal length require the further factor of sensor size to be understood. [/QUOTE]
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Different focal length chart
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