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<blockquote data-quote="WayneF" data-source="post: 139688" data-attributes="member: 12496">So much mystery and nonsense about such an easy subject.FX and DX definitely affects perspective (meaning, with the same lens, we must stand in different places for the same view - and where we stand affects perspective).&nbsp; &nbsp;&nbsp; The only reason we imagine a 85 or 105mm lens is a &quot;portrait lens&quot; is due to perspective. Any lens can work for portraits, depending where you stand. For example, you would never consider using the same one lens for a head/shoulders portrait and also for a large group shot.&nbsp; Perspective is important in that a main rule of portraits is &quot;Stand back at least six or eight feet, regardless&quot;.&nbsp; The only importance of 105mm is that on FX (classically, on 35mm film), it forces standing back about seven feet for a head and shoulders.&nbsp;&nbsp; But if DX, then 70mm is that same equivalent and same view (and same perspective if standing in the same place).&nbsp; &nbsp; The important thing is the better perspective if standing back at 6 to 8 feet.Sure, some shoot at 4 or 5 feet, the camera works there, but almost everyone agrees that 6 to 8 feet looks better.&nbsp; Some like 10 or 12 feet better.&nbsp;&nbsp; Where you stand determines perspective, which is the relative size of near and far features, like noses.&nbsp;&nbsp; Ladies don't want to see their nose appear larger.&nbsp;&nbsp; So, the idea is to stand back at least at 6 or 8 feet, and then use whatever lens that frames the view you want to see, be it head/shoulders, or full length or group.&nbsp; There is no magic focal length number, except 105mm requires FX to stand back about 7 feet for head/shoulders.&nbsp; Which is only applicable if using FX to shoot head/shoulder.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="WayneF, post: 139688, member: 12496"] So much mystery and nonsense about such an easy subject. FX and DX definitely affects perspective (meaning, with the same lens, we must stand in different places for the same view - and where we stand affects perspective). The only reason we imagine a 85 or 105mm lens is a "portrait lens" is due to perspective. Any lens can work for portraits, depending where you stand. For example, you would never consider using the same one lens for a head/shoulders portrait and also for a large group shot. Perspective is important in that a main rule of portraits is "Stand back at least six or eight feet, regardless". The only importance of 105mm is that on FX (classically, on 35mm film), it forces standing back about seven feet for a head and shoulders. But if DX, then 70mm is that same equivalent and same view (and same perspective if standing in the same place). The important thing is the better perspective if standing back at 6 to 8 feet. Sure, some shoot at 4 or 5 feet, the camera works there, but almost everyone agrees that 6 to 8 feet looks better. Some like 10 or 12 feet better. Where you stand determines perspective, which is the relative size of near and far features, like noses. Ladies don't want to see their nose appear larger. So, the idea is to stand back at least at 6 or 8 feet, and then use whatever lens that frames the view you want to see, be it head/shoulders, or full length or group. There is no magic focal length number, except 105mm requires FX to stand back about 7 feet for head/shoulders. Which is only applicable if using FX to shoot head/shoulder. :) [/QUOTE]

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