Charles Musgrave
Leading Member
I'm surprised that no one as yet has pointed out the most likely explanation -
at least from my quick read through the thread. Atmospheric conditions
can have a huge impact on perceived image softness.
Temperature fluctuations lead to air density fluctuations which causes
wave length dependent light scattering (diffraction). The same effect
leads to mirages.
Atmospheric contaminants cause variations in the relative permittivity
(the dielectric constant) which causes diffraction.
Gaseous and particulate contaminates also absorb light to change color
(not a cause of softness, but does degrade an image which increases
perception of sharpness loss). Particulates also scatter light.
It looked very obvious to me that the city shots were taken under poor
atmospheric conditions and the camera was probably doing a good
job of imaging what light was entering the lens.
BTW - don't complain too much about air density fluctuations causing
degredation of image sharpness. Without it the sky would not be blue!
Chasm
at least from my quick read through the thread. Atmospheric conditions
can have a huge impact on perceived image softness.
Temperature fluctuations lead to air density fluctuations which causes
wave length dependent light scattering (diffraction). The same effect
leads to mirages.
Atmospheric contaminants cause variations in the relative permittivity
(the dielectric constant) which causes diffraction.
Gaseous and particulate contaminates also absorb light to change color
(not a cause of softness, but does degrade an image which increases
perception of sharpness loss). Particulates also scatter light.
It looked very obvious to me that the city shots were taken under poor
atmospheric conditions and the camera was probably doing a good
job of imaging what light was entering the lens.
BTW - don't complain too much about air density fluctuations causing
degredation of image sharpness. Without it the sky would not be blue!
--left shot d200, right shot R1
what happen to d200?
d200 image is very...very soft..
oh my god.. i hope it is not real..
http://dc.watch.impress.co.jp/cda/review/2005/11/25/2732.html
http://dc.watch.impress.co.jp/cda/review/2005/11/08/2626.html
Chasm