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How your lens selection controls portrait outcome
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<blockquote data-quote="Stoshowicz" data-source="post: 541742" data-attributes="member: 31397"><p>Sir, we are not fundementally in disagreement about the physics , we differ really only in what we mean by perspective , the distortion which is noticeable standing close ,, whatever the focal length is,, is not the only thing that constitutes 'perspective".ummm IMO,, </p><p>When we mentally crop the aforementioned wide angle view, to match the narrow angle view, you are removing , what I am saying, is a perspective alteration -that you ALSO are aware of. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p>As a practical matter , at the near distances I suspect you work , the distortion is probably very evident. I use a lot of telephoto, some macro, and in these uses , this distortion just isnt high on the list of things to combat, though my closest working distances may be between four inches and ten feet. The perspective issue for a group of birds at 80 feet more likely is in trying to determine comparative size. The Cambridge article attends to this.Or that multiple subjects appear to be clumped distance-wise. </p><p>But if both of us were to try to take a photo from the inside of a car , as accurate to the drivers perspective as we can get , we probably will end up with something like a 35 to 50 mm lens.. (at least not from 15 feet behind the car with a 600mm.)</p><p></p><p>Again , from Cambridge in color ..a well reputed photographic site , the problem is jumping back in forth between popular and esoteric terminology.</p><p></p><p><span style="color: #006400"><strong>TELEPHOTO PERSPECTIVE</strong></span></p><p><span style="color: #006400"></span></p><p><span style="color: #006400"><span style="font-family: 'verdana'">A telephoto lens is special because it has a narrow angle of view — but what does this actually do? <strong>A narrow angle of view means that both the relative size and distance is normalized when comparing near and far objects</strong>. This causes nearby objects to appear similar in size compared to far away objects — even if the closer object would actually appear larger in person. The reason for this is the angle of view:</span></span></p><p><span style="color: #006400"></span><span style="font-family: 'verdana'"><p style="text-align: center"><span style="font-family: inherit"><span style="font-family: inherit"><span style="color: #006400"><img src="http://cdn.cambridgeincolour.com/images/tutorials/wa_wide-angle-of-view.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></span><span style="font-family: inherit"><strong><a href="http://www.cambridgeincolour.com/tutorials/wide-angle-lenses.htm" target="_blank"><span style="color: #006400">Wide Angle Lens</span></a></strong><span style="color: #006400"></span></span></span></span></p></span></p><p style="text-align: center"><span style="font-family: 'verdana'"><span style="font-family: inherit"><span style="font-family: inherit"><span style="font-family: inherit"><span style="color: #006400">(objects are very different sizes)</span></span></span><span style="color: #006400"></span></span></p></span></p><p style="text-align: center"><span style="font-family: 'verdana'"><span style="font-family: inherit"><span style="color: #006400"></span></span><span style="color: #006400"></span></p></span></p><p style="text-align: center"><span style="font-family: 'verdana'"><span style="color: #006400"><span style="font-family: inherit"><span style="font-family: inherit"><img src="http://cdn.cambridgeincolour.com/images/tutorials/wa_narrow-angle-of-view.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /><span style="font-family: inherit"><strong>Telephoto Lens</strong> </span></span></span></span></p></span></p><p style="text-align: center"><span style="font-family: 'verdana'"><span style="color: #006400"><span style="font-family: inherit"><span style="font-family: inherit"><span style="font-family: inherit">(objects are similar in size)</span></span></span></span></p></span></p><p style="text-align: center"><span style="font-family: 'verdana'"><span style="color: #006400"><span style="font-family: inherit"></span></span></p><p></span><span style="color: #006400"></span></p><p><span style="color: #006400"></span><span style="font-family: 'verdana'"><span style="color: #006400">Even though the two cylinders above are the same distance apart, their relative sizes are very different when one uses either a </span><a href="http://www.cambridgeincolour.com/tutorials/wide-angle-lenses.htm" target="_blank"><span style="color: #006400">wide angle lens</span></a><span style="color: #006400"> and telephoto lens to fill the frame with the closest cylinder. With a narrow angle of view, farther objects comprise a much greater fraction of the total angle of view.</span></span><span style="color: #006400"></span></p><p><span style="color: #006400"><span style="font-family: 'verdana'">A mis</span></span><span style="color: #006400"><span style="font-family: 'verdana'">conception is that a telephoto lens affects perspective, but strictly speaking, this isn't true. </span></span></p></blockquote><p></p>
[QUOTE="Stoshowicz, post: 541742, member: 31397"] Sir, we are not fundementally in disagreement about the physics , we differ really only in what we mean by perspective , the distortion which is noticeable standing close ,, whatever the focal length is,, is not the only thing that constitutes 'perspective".ummm IMO,, When we mentally crop the aforementioned wide angle view, to match the narrow angle view, you are removing , what I am saying, is a perspective alteration -that you ALSO are aware of. :) As a practical matter , at the near distances I suspect you work , the distortion is probably very evident. I use a lot of telephoto, some macro, and in these uses , this distortion just isnt high on the list of things to combat, though my closest working distances may be between four inches and ten feet. The perspective issue for a group of birds at 80 feet more likely is in trying to determine comparative size. The Cambridge article attends to this.Or that multiple subjects appear to be clumped distance-wise. But if both of us were to try to take a photo from the inside of a car , as accurate to the drivers perspective as we can get , we probably will end up with something like a 35 to 50 mm lens.. (at least not from 15 feet behind the car with a 600mm.) Again , from Cambridge in color ..a well reputed photographic site , the problem is jumping back in forth between popular and esoteric terminology. [COLOR=#006400][B]TELEPHOTO PERSPECTIVE[/B] [FONT=verdana]A telephoto lens is special because it has a narrow angle of view — but what does this actually do? [B]A narrow angle of view means that both the relative size and distance is normalized when comparing near and far objects[/B]. This causes nearby objects to appear similar in size compared to far away objects — even if the closer object would actually appear larger in person. The reason for this is the angle of view:[/FONT] [/COLOR][FONT=verdana][CENTER][FONT=inherit][FONT=inherit][COLOR=#006400][IMG]http://cdn.cambridgeincolour.com/images/tutorials/wa_wide-angle-of-view.png[/IMG][/COLOR][FONT=inherit][B][URL="http://www.cambridgeincolour.com/tutorials/wide-angle-lenses.htm"][COLOR=#006400]Wide Angle Lens[/COLOR][/URL][/B][COLOR=#006400] (objects are very different sizes)[/COLOR][/FONT][/FONT][COLOR=#006400] [/COLOR][/FONT][COLOR=#006400] [FONT=inherit][FONT=inherit][IMG]http://cdn.cambridgeincolour.com/images/tutorials/wa_narrow-angle-of-view.png[/IMG][FONT=inherit][B]Telephoto Lens[/B] (objects are similar in size)[/FONT][/FONT] [/FONT][/COLOR][/CENTER] [/FONT][COLOR=#006400] [/COLOR][FONT=verdana][COLOR=#006400]Even though the two cylinders above are the same distance apart, their relative sizes are very different when one uses either a [/COLOR][URL="http://www.cambridgeincolour.com/tutorials/wide-angle-lenses.htm"][COLOR=#006400]wide angle lens[/COLOR][/URL][COLOR=#006400] and telephoto lens to fill the frame with the closest cylinder. With a narrow angle of view, farther objects comprise a much greater fraction of the total angle of view.[/COLOR][/FONT][COLOR=#006400] [FONT=verdana]A mis[/FONT][/COLOR][COLOR=#006400][FONT=verdana]conception is that a telephoto lens affects perspective, but strictly speaking, this isn't true. [/FONT][/COLOR] [/QUOTE]
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