D80 x D7k IQ tests

Started May 28, 2011 | Discussions thread
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D80 x D7k IQ tests
May 28, 2011

Eduardo (eNo) asked about a comparison between the D80 and the D7k, so here it is. It'll be in 3 posts. This one has settings, and whole images 1000 pixels wide. Second has detail analysis with 3 images at D80's resolution and 100%. Third shows how each fares in shadow recovery (not fair ...).

I used the 105mm f/2.8 Micro VR at f/8, very good acoording to Photozone ( http://www.photozone.de/nikon--nikkor-aps-c-lens-tests/224-micro-nikkor-af-s-105mm-f28g-if-ed-vr-review--test-report?start=1 ) and slightly more DoF for detail analysis.

Both cameras set with WB in daylight setting, since I was getting light through a balcony door open. ISO at 100. Day slightly overcast but bright.

I chose a variety of targets, see images below. Set tripod and shot like 20 images for each camera, varying focus points around the cameras' choices. Both did a good job getting good focus point which was right in the middle of taxi cab toycar.

Imported all images and chose the best from each. Chose Standard Mode and turned sharpening off, since the default (3) may mean different things for each camera. Adjusted luminosity with histograms, there was a slight difference of about 0.15 stop, even though I used same exposure settings, maybe just a slight change in lighting as I changed cameras.

Here are the two best images, resized to 1000 pixels across, USM=(30,2,0) in CNX2.



Maybe some will already be able to see detail differneces, but one notable is is color. The D80's produced a slightly warmer tone, but the doll's colors are more accurate for the D7k's image, in particular the dark pink part, on my monitor. Also, D7k tone curve seems a bit less agressive, there is more info in the shadows for it.

But both look goos at this size, very usable, the lens is outstanding for such a subject. Both rendered the old ivory piano wood pretty well, with a slight edge for the D7k. Next, details.
OnExposure member

Good shooting and good luck
(after Ed Murrow)

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