Return of Interesting article on DxO about 5D III and D800...

Started Apr 10, 2013 | Discussions thread
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Just another Canon shooter
Senior MemberPosts: 4,691Gear list
Re: just lines
In reply to Mako2011, Apr 13, 2013

Mako2011 wrote:

Just another Canon shooter wrote:

Mako2011 wrote:

Mako2011 wrote:

Image resolution is the detail an image holds. Higher resolution means more image detail.

You have to explain now what "detail" is, and what it means for an image to "hold it".

As I pointed out in this example... Number of lines. Simple stuff. You get the same count either picture.

At what angle? What contrast? Which color channel? Even if you answer all that - why would that be a measure of resolution, and not of aliasing? Why not circles instead of lines? Or points?

In scenario B, as presented here, only the line count mattered as that was the only detail present. A and B were in fact the same regards resolution. Pretty obvious that angle, contrast, and color channel had no bearing on resolution in that example.

Then you have a definition of resolution which applies to one example only?

Why is the slanted edge test slanted then, if the angle has no bearing on resolution? What if you chose different spatial frequency and the other lens seem to win, etc.?

 Just another Canon shooter's gear list:Just another Canon shooter's gear list
Canon EOS 5D Mark II Canon EF 15mm f/2.8 Fisheye Canon EF 35mm f/1.4L USM Canon EF 50mm f/1.2L USM Canon EF 135mm f/2.0L USM +4 more
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