Reply to thread

Message

<blockquote data-quote="WayneF" data-source="post: 424679" data-attributes="member: 12496">Well, let's see...&nbsp; four stops could be f/40 vs f/10 (4 stops).Let's see...&nbsp;&nbsp; This was f/11 (less than 4 stops)<img src="http://www.scantips.com/lights/images/diffract/800_8750.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://www.scantips.com/lights/images/diffract/800_8748.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Darn tooting!&nbsp; That looks like very much more than 2 microns to me.&nbsp; It is an &quot;Inch&quot; ruler with 105mm lens, macro distance.Do you see the diffraction hurting this one?&nbsp; Where?&nbsp;&nbsp; &lt;he he he&gt;Stopping down obviously can often improve the overall picture, when the DOF helps more than the diffraction hurts.&nbsp; If it helps, it helps.I've known that for decades, and it is much older knowledge.From <a href="http://www.scantips.com/lights/diffraction.html" target="_blank">Diffraction limited images? Really?</a></blockquote>

[QUOTE="WayneF, post: 424679, member: 12496"] Well, let's see... four stops could be f/40 vs f/10 (4 stops). Let's see... This was f/11 (less than 4 stops) [IMG]http://www.scantips.com/lights/images/diffract/800_8750.jpg[/IMG] [IMG]http://www.scantips.com/lights/images/diffract/800_8748.jpg[/IMG] Darn tooting! That looks like very much more than 2 microns to me. It is an "Inch" ruler with 105mm lens, macro distance. Do you see the diffraction hurting this one? Where? <he he he> Stopping down obviously can often improve the overall picture, when the DOF helps more than the diffraction hurts. If it helps, it helps. I've known that for decades, and it is much older knowledge. From [URL="http://www.scantips.com/lights/diffraction.html"]Diffraction limited images? Really?[/URL] [/QUOTE]

Verification