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<p>[QUOTE=&quot;rmpsrpms, post: 2535802, member: 31773&quot;]Cool stuff guys! </p><p><br /></p><p>I shot the same 54-S RPM#4 with the lens reversed at f/3.8. See full sensor and crops below.</p><p><br /></p><p>I also included a &quot;money shot&quot; of the date and mintmark. This shot is a 1600x1200 crop from the full sensor shot, then downsized to 800x600 to eliminate the softening effects of sensor demosaicing. Note that at f/3.8 I am shooting near the DLA of the Canon XS sensor, so the downsizing is not helping reduce diffraction softening, but there is still significant softening at 100% crops due to the camera itself. </p><p><br /></p><p>A disadvantage of the longer lens is it&#039;s harder to get high magnification. Using a Pentax Auto Bellows, I can only get up to around 2:1. However, with a sharp lens at 2:1 and 2x downsizing, the crops are excellent and sharp as proven by the money shot...</p><p><br /></p><p><img src="http://i943.photobucket.com/albums/ad273/rparkhurst/89PE%20Reverse.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><img src="http://i943.photobucket.com/albums/ad273/rparkhurst/89PE%20Reverse_3.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><img src="http://i943.photobucket.com/albums/ad273/rparkhurst/89PE%20Reverse_4.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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