09-21-2010, 11:47 AM
[quote name='Rainer' timestamp='1285068612' post='3047']
Nice review Markus ...
just one question ... I know you were mentioning this in a different thread once ...
why are those differences in the vignetting values between the Nikon-tests and
the Canon-tests? Because, if you would take this lens and the Canon 24Lii, and
you would take comparable (wide open) images on film, I doubt that one would
see a difference of about 1 stop in the corners (between the Nikon and the Canon
exposure).
Just a thought ... Rainer
[/quote]
Hey Rainer. Markus actually states that in his reviews:
"[color="#000080"]We're performing our vignetting analysis based on (uncorrected) JPEGs straight from the camera. The JPG engine of the Nikon D3x features a rather flat gradation curve, thus has a moderate contrast characteristic, resulting in comparatively low vignetting figures - the corresponding Canon figures are roughly 40% higher due to the more aggressive default contrast setting.[/color]"
So that is just it... the tonal curve in standard JPEGs of the EOS 5D mk II is more steep than the tonal curve of the D3x. More contrast in the standard JPEGs for the 5D mean darker corners, more apparent light fall off.
Nice review Markus ...
just one question ... I know you were mentioning this in a different thread once ...
why are those differences in the vignetting values between the Nikon-tests and
the Canon-tests? Because, if you would take this lens and the Canon 24Lii, and
you would take comparable (wide open) images on film, I doubt that one would
see a difference of about 1 stop in the corners (between the Nikon and the Canon
exposure).
Just a thought ... Rainer
[/quote]
Hey Rainer. Markus actually states that in his reviews:
"[color="#000080"]We're performing our vignetting analysis based on (uncorrected) JPEGs straight from the camera. The JPG engine of the Nikon D3x features a rather flat gradation curve, thus has a moderate contrast characteristic, resulting in comparatively low vignetting figures - the corresponding Canon figures are roughly 40% higher due to the more aggressive default contrast setting.[/color]"
So that is just it... the tonal curve in standard JPEGs of the EOS 5D mk II is more steep than the tonal curve of the D3x. More contrast in the standard JPEGs for the 5D mean darker corners, more apparent light fall off.