Johnny,
Thanks for your message.
Unfortunately 1/2" square equivalent is only 160 x 160 pixels.
So do do a meaningful comparison, I cropped your SimonTestCrop2.jpg image down
to 160x160 and then enlarged it 200% back to 320x320, so that we have the
equivalent of a 1/2" section from a 9 x 6 print displated at 320x320 pixels on
the monitor screen.
I've uploaded it as:
http://www.lestac.co.uk/om/SimonTestCrop2.jpg
Regards,
Simon
-----Original Message-----
From: Johnny Johnson [mailto:jjohnso4@xxxxxxxxxxx]
Sent: 15 August 2004 02:06
To: olympus@xxxxxxxxxx
Subject: [OM] Re: Digital vs. Film discussions REQUEST TO DSLR USERS
At 12:08 PM 8/14/2004, Simon Worby wrote:
>I've decided to join the Digital vs. Film discussions...
>
>Please could someone send me a sharp focus, no camera-shake image from a
>good DSLR (preferably E-1, but not necessarily). Anything with good
>details will do...
OK Simon, I decided to play - sort of.
The following is a link to a 3076 x 2052 image shot with a Canon 10D (6mp),
in RAW format, converted to a TIFF image, down-sampled to 899x 600 in
Photoshop and then saved as a JPG.
<http://jjohnso4.home.comcast.net/Temp/SimonTest.jpg>
Here is a 100% (unsampled) 468 x 468 crop from the bottom right of the
original TIFF image, saved as a JPG.
<http://jjohnso4.home.comcast.net/Temp/SimonTestCrop.jpg>
And, here's a 372 x 372 crop from the top center of the image:
<http://jjohnso4.home.comcast.net/Temp/SimonTestCrop2.jpg>
For people other than Simon that may not be accustomed to viewing images at
100% on a monitor. The image really is sharper than it looks in the crop
because what you're seeing would make a very large print if printed at the
same scale. For example, if you're viewing the crop on a 15" monitor
running at a resolution of 768x1024 then the crop is the equivalent of a
~25" x ~37.5" print. (I'm sure someone will check my math and let me know
if I miscalculated.) :-)
Simon, others - feel free to right click on the above images and download
for your own experimentation.
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