Thats fine.


If he used a relevant COC such as .019 he would have found:


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<table summary="results of depth of field calculation" width="100%" style="padding: 4px;" class="resultsTable"]
<tbody>
<tr>
<td width="55%" align="left" valign="top" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Subjectdistance</td>
<td name="resultsDistance" align="left" valign="top" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="resultsDistance" class="textClassResults"]16ft</td>
</tr>
<tr>
<td colspan="2" align="top" style="padding: 1px;"]
</td>
</tr>
<tr>
<td colspan="2" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Depthoffield</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; text-indent: 20px; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Nearlimit</td>
<td name="dofNear" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="dofNear" class="textClassResults"]9.75ft</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; text-indent: 20px; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Farlimit</td>
<td name="dofFar" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="dofFar" class="textClassResults"]44.5ft</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; text-indent: 20px; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Total</td>
<td name="dofTotal" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="dofTotal" class="textClassResults"]34.7ft</td>
</tr>
<tr>
<td colspan="2" style="padding: 1px;"]</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; text-indent: 20px; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Infrontofsubject</td>
<td name="dofFront" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="dofFront" class="textClassResults"]6.2ft (18%)</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; text-indent: 20px; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Behindsubject</td>
<td name="dofRear" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="dofRear" class="textClassResults"]28.5ft (82%)</td>
</tr>
<tr>
<td colspan="2" style="padding: 1px;"]</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Hyperfocaldistance</td>
<td name="hyperFocal" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="hyperFocal" class="textClassResults"]24.9ft</td>
</tr>
<tr>
<td style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" class="textClassResults"]Circleofconfusion</td>
<td name="cocused" align="left" style="font-weight: bold; font-size: 12px; margin: 0px 5px 5px; color: black; font-family: Verdana, Arial, sans-serif; padding: 1px;" id="cocused" class="textClassResults"]0.019 mm</td>
</tr>
</tbody>
</table>






Therefore, I advise consider stopping down to be with in the performance specifications he desired for his IQ.