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<p>[QUOTE=&quot;benveniste, post: 2664122, member: 25547&quot;]Exact quote:&nbsp; &quot;The first macro lens I purchased for photographing coins was a 105mm AFS Micro-Nikkor, and I quickly found it unsuitable due to difficulty in lighting.&nbsp;&nbsp; You then claimed this was due to the working distance and the width of the lens.&nbsp; The working distance claim was easily debunked, so your next exact quote was:&nbsp; &quot;Coupled with the relatively short working distance (debunked), this severely limits the lighting angles you can achieve.&quot;</p><p><br /></p><p>So which part didn&#039;t I understand?</p><p><br /></p><p><br /></p><p><br /></p><p>Here is a picture of the Pentax M42 bellows.&nbsp; I don&#039;t see a movable tripod mount, do you?&nbsp; Again, feel free to post a picture of yours.</p><p><br /></p><p>[ATTACH]591662[/ATTACH]</p><p><br /></p><p><br /></p><p><br /></p><p>Okay, here are the formulae.&nbsp; My camera is a D800.&nbsp; Run it yourself if you don&#039;t believe me.</p><p>o = f((1/m) + 1) (where o=object distance, f=focal length, m=magnification)</p><p>minimum angle of incidence = arctan(o * 2/diameter of lens)</p><p><br /></p><p>With a ring-light, I can achieve a 60 degree angle of incidence, but challenging me to do something without checking if it&#039;s possible goes beyond exaggeration to pure and simple dishonesty.[/QUOTE][/QUOTE]</p><p><br /></p>

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