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<p>[QUOTE=&quot;dougsmit, post: 2066554, member: 19463&quot;]<a href="http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm" rel="nofollow">http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm</a></p><p><br /></p><p>The above is a resource for figuring out where diffraction will limit sharpness of images.&nbsp; It depends on the size, not number, of pixels on the sensor.&nbsp; For most dSLR&#039;s, f/8 is perfectly free from diffraction but f/11 is so little affected that it is OK to use to gain the additional depth of field.&nbsp; Point and shoot cameras with small sensors and large numbers of pixels have such small pixels that diffraction come in much lower, even at f/4.&nbsp; It is not a perfectly simple call but first requires knowing the camera involved and its sensor size.&nbsp; The site above gives results for many common cameras so you can select the one nearest to what you own and find an aperture that makes the bright central part of the blur fit inside one box.&nbsp; ...or you can shoot at several apertures and choose the one that gives you the most pleasing results.[/QUOTE]</p><p><br /></p>

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