diffraction
in [Digital Cameras]
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From: Charles on 21 Dec 2009 20:11 start here: http://www.luminous-landscape.com/tutorials/understanding-series/u-diffraction.shtml
From: ray on 21 Dec 2009 20:15 On Mon, 21 Dec 2009 16:03:24 -0800, egbert_no_bacon wrote: > what is diffraction, and do you have an example or know where an image > of such is posted for me to see please http://en.wikipedia.org/wiki/Diffraction
From: egbert_no_bacon on 21 Dec 2009 20:36 On Dec 22, 1:11 am, "Charles" <charlesschu...(a)comcast.net> wrote: > start here:http://www.luminous-landscape.com/tutorials/understanding-series/u-di... i would have said 'soft' after f8 so 'looking soft and lacking' is diffraction
From: Nervous Nick on 21 Dec 2009 20:48 On Dec 21, 6:26 pm, "Jeff R." <cont...(a)this.ng> wrote: > "egbert_no_bacon" <egbert_no_ba...(a)hotmail.co.uk> wrote in message > > news:59ce6c6d-8b34-48f3-aaea-04e69a04302a(a)v30g2000yqm.googlegroups.com... > > > what is diffraction, and do you have an example or know where an image > > of such is posted for me to see please > > Here is one of mine from a few years ago:http://www.mendosus.com/armidale/uralla.jpg > > Nikon D50, f/22, 8 seconds, 24-120 zoom set at 24mm. > Two frames poorly merged (but that doesn't matter). I think that's a great photo. I wish you had posted it larger. FWIW. -- YOP...
From: Charles on 21 Dec 2009 21:01
"egbert_no_bacon" <egbert_no_bacon(a)hotmail.co.uk> wrote in message news:b839930e-6fb7-4e2a-8707-3bbac8b1baaa(a)k19g2000yqc.googlegroups.com... On Dec 22, 1:11 am, "Charles" <charlesschu...(a)comcast.net> wrote: > start > here:http://www.luminous-landscape.com/tutorials/understanding-series/u-di... i would have said 'soft' after f8 so 'looking soft and lacking' is diffraction Yes, diffraction limiting can cause loss of sharpness. The general rule is that f/8 is the limit (for many lens/camera combos) when TACK sharpness is needed and f/11 is the limit for VERY GOOD sharpness. Sharpness is not always the limiting factor. A lens at f/16 or f/22 gives a nice depth of field which can be more important. There are only general rules in photography, because there are so many applications. Camera shake and subject motion are often more important as limiting factors. |