BREAKING: Z7 sensor performance is tested better than D850. Way better resolution & MTF50

[JimKasson]

https://www.pdnonline.com/gear/cameras/mirrorless/nikon-z7-camera-review/

To be honest, it seems the DELTA values are quite a bit off for some colors.

Hi,

I think that is bad information. You probably have at least a dozen settings on the camera that affect color reproduction.
In general, you don't want a faithful representation of color as long as the dynamic range of your display device does not match the luminance range of the subject. Delta E takes luminance variations into account, so it is a very bad measure for accurate reproduction of color.

In general, saturation is enhanced in raw conversions. Cutting back on saturation would often improve DeltaE, but it may be that an image that is oversaturated may be perceived better than a lower saturation image that is more sensitometrically correct.

Best regards

Erik

The common s-shaped tone curve also improves perceived color naturalness in most situations, but will enlarge the Delta-E's.

Jim

 

[Erik Kaffehr]

The common s-shaped tone curve also improves perceived color naturalness in most situations, but will enlarge the Delta-E's.

Jim

Thumbs up on that one!

Best regards

Erik

 

[Iliah Borg]

https://www.pdnonline.com/gear/cameras/mirrorless/nikon-z7-camera-review/

To be honest, it seems the DELTA values are quite a bit off for some colors.

Hi,

I think that is bad information. You probably have at least a dozen settings on the camera that affect color reproduction.
In general, you don't want a faithful representation of color as long as the dynamic range of your display device does not match the luminance range of the subject. Delta E takes luminance variations into account, so it is a very bad measure for accurate reproduction of color.

In general, saturation is enhanced in raw conversions. Cutting back on saturation would often improve DeltaE, but it may be that an image that is oversaturated may be perceived better than a lower saturation image that is more sensitometrically correct.

Best regards

Erik

The common s-shaped tone curve also improves perceived color naturalness in most situations, but will enlarge the Delta-E's.

Jim

They are not measuring the naturalness of look, they are providing data on colour reproduction Anything above dE 6 is hard to consider reproduction.

At the very least, the test is misleading, the metrics in inapplicable.

 

[Jack Hogan]

https://www.pdnonline.com/gear/cameras/mirrorless/nikon-z7-camera-review/

Hi,

Those tests are more an evaluation of the camera's JPEG processing than an evaluation of the camera and the sensor.

Image Engineering is probably a well respected lab, doing a lot testing for German periodicals and developing gear for camera testing.

But, the test reports discuss results from the cameras JPG engine and that has a lot of value if you shoot JPEG but very little value if you shoot raw.

Well, it's an evaluation of the whole image chain: lens + sensor + readout + JPEG processing + camera settings. One can only draw conclusions about what the whole chain at the chosen settings produces. One cannot draw conclusions about the sensor alone.

Readings vary much more with different processing settings within a single camera than with similar processing from different cameras of the same class. In fact with sharpening you can make an image measure arbitrarily 'sharp', with noise reduction arbitrarily noiseless, etc. Have you read the OJ metaphor ?

When considering the purchase of a new piece of kit one is interested in how well the hardware performs compard to its peers, not how good LR is.

Cheers,

Jack

 

[bontemps]

The same graph in the D850 review is labelled as AF-S 2.8 105. So quite a different lens.