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Re: [OM] A wasted effort

Subject: Re: [OM] A wasted effort
From: Moose <olymoose@xxxxxxxxx>
Date: Mon, 16 Mar 2009 21:33:14 -0700
In support of the below. 
<http://www.moosemystic.net/Gallery/Others/CHLing/F4_22.htm>

Moose

Moose wrote:
> Chuck Norcutt wrote:
>   
>> I don't doubt your word but I don't understand why. Is there a human vision 
>> component that is helping piece the image together?  I think something like 
>> that is hypothesized for digital due to the lack of grain.
>>   
>>     
>
> The missing element may be edge contrast. As I've said many a time, 
> digital image capture, by its very nature, softens the contrast at 
> edges. Add to that lower contrast from the lens at f22, as C.H. reports, 
> and you have a classic case of hidden detail.
>
> A digital image with a difference of one in the value of the brightness 
> across an edge has resolved that detail. But it is invisible to our 
> eyes, so we tend to assume it isn't there. Sharpening enhances the 
> contrast at edges, "magically" revealing what we couldn't see before.
>
> "Sharpness" has never been a clearly defined quality in images. It's 
> some sort of mix of edge contrast, accutance, in film speak, overall 
> sharpness and resolution.
>
> Moose
>   

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