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

Started Apr 10, 2013 | Discussions thread
John Sheehy
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Re: Return of Interesting article on DxO about 5D III and D800...
In reply to Steen Bay, Apr 14, 2013

Steen Bay wrote:

aftab wrote:

I need to correct myself.

If we have alternating black and white lines, each 0.08mm wide, human eye with best resolving power in optimum condition (light, angle etc) won't be able to separate them. Let's say 0.1mm wide be the maximum our eyes can resolve. How many lp/mm that comes down to? 10, isn't it. 36 lp/mm, I mentioned before, is way too small for us to discern.

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Well, we're usually not looking at 24x36mm prints from a FF camera. If e.g. viewing at 100% on our monitor, then the image is magnified quite a bit.

Even if we were viewing at 100% magnification of the sensor, these tidbits about human perception are usually meaningless when taken to a broader context.  Sure, a certain B/W line density may blur into a solid gray as far as you can perceive, but that does not mean that you can not appreciate items staggered at that resolution or higher.  The former is a blur effect; the latter has to do with the ability of the brain to perceive relative mean analog placement of objects.  IOW, blur does not affect the apparent mean location of dots, edges, etc; it only obscures details repeating at that frequency.  Beware of tidbits and anecdotes about human perception; they are almost always irrelevant in a larger context.

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