Re: 11x14, no way??
- From: "Scott W" <biphoto@xxxxxxxxxxx>
- Date: 3 Jan 2006 15:18:50 -0800
Lorem Ipsum wrote:
> "Tesco News" <photy@xxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:iHluf.25099$q4.3059@xxxxxxxxxxxxxxxxxxxxxxx
>
> > As I suspected the Techno Druids, (circa 1960), appeared and proved that I
> > do not know what I am talking about.
>
> Well, let this 1946 model step in.
>
> > You should be able to print larger than 14 x 11 from a scanned 35mm slide.
> > Provided, of course that the slide is nice and sharp, well exposed and
> > well processed.
>
> A 'straight' print from a 35mm at 4000ppi (true 4000) should print nicely to
> 13x19 on a good 300ppi printer.
The problem is that film when scanned at 4000 ppi produces very soft
pixels. Try printing any 4000 ppi film scan at 300ppi and at 600 ppi
and the 600 ppi scan will look much sharper then the 300 ppi scan.
> Interpolating the original to 10% larger is not a bad stretch, so I think
> you are right on, FAPP. Some people can stretch it 20% and, by their
> standards, it's okay.
>
> Let's all not forget that the normal viewing distance is a consideration.
> Most people don't stick their noses into a very large print, but view it
> from a greater distance. If this principle did not work, billboard photos
> would not exist.
This is true to a large extent, if the print is going to be hanging on
a wall where people do not go up to it then it does not need near the
resolution as if people will be giving it a close look. But I kind of
got the idea that the prints the OP was making were going to be getting
a close look.
I Have been disappointed time and again when I have seen a large photo
from a distance that looked good only to find it looking soft when I
walk up to it.
I would like to think a good print would entice someone to come up to
it and take a closer look, it would be nice if the print had the detail
needed to hold up to that closer look.
This is the test I did when I was looking at how much resolution I
needed for prints. Take a photo at the current resolution, whether it
be film or digital it does not matter in the least. Take the same
photo but with a much longer lens. Scale the first image for the print
size you want. Now pastes the second image on top of the first and
scale it to match the first image. What you should now have is a large
image with a clearer center rectangle. Print this out at the size you
are looking for.
I did this test for a 14 x 21 inch print using my 20D. When I look at
the print the center looks so much sharper and it would be hard for me
to be happy with 14 x 21 inch prints using the 8MP from the 20D.
This is the test image.
http://www.pbase.com/konascott/image/54366151/original
Scott
.
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