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<p>[QUOTE=&quot;dougsmit, post: 2611393, member: 19463&quot;]The difference between 150 and 180 is not significant and the Sigma has a good reputation.&nbsp; If I were going to upgrade that set up, I&#039;d buy a full frame body rather than a lens adding only 20% more working distance.&nbsp; I will point out that a heavy lens like that needs a rock solid support.&nbsp; I prefer a home make wood stand with less vibration but those who much have a commercial one need to avoid underweight, wobbly metal which will erase any quality added by a better lens.[/QUOTE]</p><p><br /></p>

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