Archived posting to the Leica Users Group, 2006/05/28

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Subject: [Leica] Clarification of "Lens Quality . . . "
From: images at InfoAve.Net (Tina Manley)
Date: Sun May 28 13:09:26 2006
References: <00cd01c6821a$e9e976b0$6401a8c0@none729d257894>

At 01:52 AM 5/28/2006, you wrote:
>1. The reason I might use a loupe is that I have a print and I want 
>to read some detail in that print. So the question becomes how much 
>detail is available before it turns into grain or dots. Surely it 
>matters about the enlarger, etc, vs. merely printing a digital file, 
>and surely it matters how many dpi are put out by the inkjet printer 
>(and the resolution of that system... If you paper resolves 25lp/mm, 
>that is 600+ lp/inch, I am not sure what 1400dpi means in terms of 
>resolution).


This article explains resolution and sharpness and what we can and can't see:
http://www.luminous-landscape.com/tutorials/sharpness.shtml

Here is an interesting article comparing 35mm digital to medium format film:
http://www.luminous-landscape.com/reviews/shootout.shtml
And it was written in 2003.  Enormous strides have been made in 
digital since then.

A more recent comparison between 4x5 film and digital backs:
http://www.luminous-landscape.com/essays/back-testing.shtml

Tina

Tina Manley, ASMP
www.tinamanley.com
http://www.pbase.com/tinamanley/dimes_for_hunger 


In reply to: Message from krieger at usc.edu (Martin Krieger) ([Leica] Clarification of "Lens Quality . . . ")