Some new infos about dp2Q from the touch and try event. + JPEG samples from Yodobashi and MapCamera

Started 3 months ago | Discussions thread
victorgv
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Re: noise is still not convincing, but the lens is
In reply to Usee, 3 months ago

Usee wrote:

victorgv wrote:

Usee wrote:

victorgv wrote:

Usee wrote:

PrebenR wrote:

Usee wrote:

I already hinted at that point, no need to overlook it every time:

http://www.dpreview.com/forums/post/53857097

"They are not matched according DOF, brightness and contrast ... beside sharpening etc..."

dp2Q is an APS-C camera and D800 is FF.

Yes, it wasn't me, who made the comparison, but Sigma.

But it doesn't matter how dp2Q relates to D800, when you compare it to DP2M.

We have no comparison to the DP2M yet, but we have figures from DxOmark for the D800 and a comparison with the DP2Q...

...we have also numbers from imaging-resource for the SD1 and the D800:

http://www.imaging-resource.com/PRODS/SD1/EXIF/SD1hSLI0100.HTM

http://www.imaging-resource.com/PRODS/nikon-d800/EXIF/D800hSLI00100NR0.HTM

...which indicate a exposure time, of 1/13 s for the SD1 and 1/20 for the D800 at the same scene, the same aperture and at the same ISO setting...

...we also have a comparison between the SD1M and the DP3M, which also shows differences according the true meaning of the ISO numbers...

What distance from camera to object? Is it the same for both cameras or different if it is different here is your answer for difference in exposure.

You mean, that the distance to the object is more important, than the object itself - for the exposure time?

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U see?

i mean that the farther camera from object the longer exposure needed everything else been equal.

Make a practical test:

Use a zoom lens (at F 8, or smth, to avoid vignetting issues) to keep (the framing of) the scene the same (sun, in the back and lenshood attached), whilst changing the distance...

...other who have doubts, can do the same, to avoid a off topic discussion.

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People who have no zoom lens at hand, to keep (the framing of) the scene the same, whilst changing the distance to the object, can take a look at the EXIF of the imaging-resource samples...

D7100 APS-sensor:

http://www.imaging-resource.com/PRODS/nikon-d7100/EXIF/D7100hSLI00100NR0.HTM

D800 FF-sensor:

http://www.imaging-resource.com/PRODS/nikon-d800/EXIF/D800hSLI00100NR0.HTM

...DxOmark for the ISO sensitivity:

http://www.dxomark.com/Cameras/Compare/Side-by-side/Nikon-D7100-versus-Samsung-NX-1000-versus-Nikon-D800___865_804_792

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Now, the question:

Why show the D7100 and the D800 the very same behaviour according exposure,

despite they used the same 70 mm lens?

First of all they do not have same lens. exif does not say it is 70mm native or 70mm equivalent to FF.

Obviously they had to change the distance, to keep the framing the same...

...but the exposure time kept the same.

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Please make the mentioned practical test and accept the outcome,

before we make a avoidable off topic discussion.

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Envy is the highest form of recognition.
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Stop to run, start to think.
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Avoid to have only one point of view!
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U see?

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