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<blockquote data-quote="WayneF" data-source="post: 181167" data-attributes="member: 12496">But what is never mentioned is DX.&nbsp; 105mm is 160mm effective view on DX, which is approaching a longer telephoto.&nbsp;&nbsp; It is one thing on your FX, but somewhat different on DX. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />105 was a classic for head/shoulders portraits in the days of 35mm film (FX).&nbsp; It forced the camera to stand back 6 feet or so, to get it all in, which was good for perspective (to avoid making noses look larger, etc).&nbsp; But 160mm effective on DX has to stand back a lot farther.&nbsp; Some living rooms don't allow that much space.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />For DX, 70 mm is the same effective focal length as 105mm on FX.&nbsp; Same view, and does all the same things.</blockquote>

[QUOTE="WayneF, post: 181167, member: 12496"] But what is never mentioned is DX. 105mm is 160mm effective view on DX, which is approaching a longer telephoto. It is one thing on your FX, but somewhat different on DX. :) 105 was a classic for head/shoulders portraits in the days of 35mm film (FX). It forced the camera to stand back 6 feet or so, to get it all in, which was good for perspective (to avoid making noses look larger, etc). But 160mm effective on DX has to stand back a lot farther. Some living rooms don't allow that much space. :) For DX, 70 mm is the same effective focal length as 105mm on FX. Same view, and does all the same things. [/QUOTE]

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