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Please explain "downsizing"....

Leonard62

Pa, US
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"RE: Please explain "downsizing"...."

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Thu 09-Feb-12 03:18 PM

Eric is explaining what DxO does to come up with a common print size for comparison purposes.

I downsize in order to view different camera photos on the computer at the same size for comparison purposes.

I use a D3X which has an image size of 6,048 X 4,032 pixels or 24.4 mp.

I compare the images to my D700 with is 4,256 X 2,832 pixels or 12.1 mp.

I do this by viewing my D3X photo in CS5 and looking at the image size of the photo. It shows 6,046 and 4,032. I change that to 4,256 and 2,832. And save it. If my D3X and D700 photos were of the exact same scene I now have two photos of the exact same size and I can compare the quality of both to each other. If I'm looking at the noise of the D3X photo at 100%, the noise is slightly reduced when down sizing to the D700 size.

Unlike the DxO results which show the D700 noise as slightly better then the D3X noise, I find the D3X has ever so slightly less noise then the D700 after downsizing on my computer screen. Here is a comparison of my D3X and D700 side by side after down sizing.

The D3X photo is on the left. This is a comparison of photos taken at ISO 6400 and enlarged 100%.

Click on image to view larger version


I get the same results every time I run these comparison tests.

Len



Attachment#1 (jpg file)

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A general, generic topic Please explain "downsizing".... [View all] , hollingwD80 , Thu 09-Feb-12 01:20 PM
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