Johnny,
Doesn't it depend how big your monitor is? And what resolution you're running
it. But that does sound about right, i.e. it's highly enlarged. Which is
exactly what I intended: I'm trying to enlarge a portion of the image
sufficiently that you can see the grain & errors, etc. coming in, so a
comparison can be made.
The human eye will see a 6.1 MP image as near perfect if it's printed out on
quality equipment @ 4 x 3" (by my reckoning that's 700-ish dpi as the source
image is 2850 x 2138).
But I keep reading that it's possible to blow up a digital image to A4 size,
say roughly 12" x 8". I make that 240-ish dpi, which I classify as crap.
As I haven't got any 12 x 8 film prints I could scan in, I went for 9 x 6.
Of course, since film doesn't have dpi equivalents, all I can do for comparison
is to scan in a 9 x 6 film print as best I can, and "enlarge" a section of it.
It's unfair to DSLR because I have to blow up what is already a lossy image
(JPEG), but it's equally unfair to film because to blow it up to show it
sensibly on screen, I have to "digitalise" something that isn't digital.
So overall, I think it's probably a reaonably fair comparison.
Regards,
Simon
-----Original Message-----
From: Johnny Johnson [mailto:jjohnso4@xxxxxxxxxxx]
Sent: 14 August 2004 20:15
To: olympus@xxxxxxxxxx
Subject: [OM] Re: Film vs. Digital @ equivalent 9 x 6 print then cropped
and enlarged
At 02:08 PM 8/14/2004, Simon Worby wrote:
>This is the (made up, coz I didn't print it!) 1/2" square section.
>http://www.lestac.co.uk/om/Dettora320sq.jpg
Hi Simon,
If I understood what you did and if my calculations are correct, what
you're showing "on screen" is the equivalent of printing the image at a
size of ~42" x 64", not 6" x 9".
Later,
Johnny
__________________________
Johnny Johnson
Lilburn, GA
mailto:jjohnso4@xxxxxxxxxxx
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