Olympus-OM
[Top] [All Lists]

Re: [OM] how many megapixels here?

Subject: Re: [OM] how many megapixels here?
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Wed, 02 Dec 2009 15:17:13 -0500
Unless hawkeye Moose is doing the viewing.

Chuck Norcutt

Ken Norton wrote:
>> Is an 11 Mpix sensor big enough with make a 48" wide image with more than
>> enough fine detail to withstand careful up close scrutiny ?
> 
> 
> If the edge-sharpness is there, the answer is a resounding yes!
> 
> All this talk about maintaining 300dpi for printing is a bunch of hogwash.
> The eye is able to discern a line at 300dpi, but is unable to see anything
> else down there.
> 
> To prove me wrong, do the following:
> 
> Make an image file in your editor of choice and create a pattern of 1 pixel
> wide vertical black and white lines. Print this at 300dpi.  Can you see the
> pattern?  Let's go one step further. Add horizontal black lines.  This
> should give you 1 pixel white dots surrounded by 1 pixel of black.  Can you
> see the dots?
> 
> Now, start scaling the images up to 200dpi on the printed page.  Then try
> 150dpi.  Even try 75dpi.
> 
> At 150dpi the human eye is easily able to discern the lines and dots
> (provided that the scaling engine didn't blur things too much), but just
> barely. If the edges of the lines remain sharp and not blurred, the detail
> is maintained to the maximum of what the human eye is comfortably viewing.
> 
> Now comes the fun part.  I hope that the three prints are identical.
> Randomize the prints and grab one and guess which one is at which
> resolution.  Hand the 150dpi print to another anal-retentive photographer
> and ask him/her what resolution it was printed at.
> 
> Folks, when tests like these are performed without bias, you'll find more
> times than not that the lower-res image looks exceptionally sharp and highly
> detailed.
> 
> AG
-- 
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz