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elec164

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"RE: D80 landscapes"

elec164 Silver Member Nikonian since 15th Jan 2009
Fri 22-Jun-12 12:25 PM

Diffraction is a property of a waveform as it encounters an obstacle/barrier. So yes it’s due to the aperture and the amount of enlargement of the capture. So the sensor size itself is not responsible, but the amount of enlargement to achieve a specific print size and the viewing distance of the print. It’s similar to DOF in that regard. Again assuming an 8x10 print viewed at 18 inches, a DX sensor needs a 13 times enlargement to achieve that size and would show diffraction after about f/11. An FX sensor needs about 8 times enlargement and would show diffraction after about f/16. But again that assumes a specific enlargement at a specific viewing distance. If you crop then enlarge or view the print closer than what’s considered a normal distance, you will need a larger aperture to avoid diffraction affects.

Also the softness due to diffraction can be mitigated to an extent by a sharpening process known as de-convolution. But while de-convolution can improve the appearance of relative sharpness, it cannot recover fine detail that was lost to diffraction.

Rather than give a lengthy explanation you can check out these two articles. One at Luminous-landscape and the other at Cambridge-in-Colour .

Pete

Pete

Visit my Nikonians gallery.

A general, generic topic D80 landscapes [View all] , shearer , Wed 20-Jun-12 06:17 PM
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