F717 TIFF's?

MichaelFS said:

I played around today with highest quality TIFF's: 2560 X 1920,
FINE, etc.
I didn't realize that they would be 'recorded' at 72 ppi. So I open
this picture up in PS, and it's 36" X 27"!! LOL! I hadn't given
this issue much thought, I guess. For some reason, I was thinking
that highest quality images were always recorded at a resolution
higher than 72!

I'm going to be printing at 13" X 19" on an Epson 2200 at somewhere
between 240 and 360 dpi.

Am I going to have to downsize this TIFF file in PS (going down to
13X19 & 300dpi)? That's throwing away pixels and adding them. This
doesn't sound very choice in terms of maintaining image quality for
prints. Is there something I'm missing here? Is there a setting
that I'm missing that can have the 717 record a TIFF file at say,
300ppi?

Sorry if this post is a duplicate, but I don't think the last one I
sent got through.

Click to expand...

santa said:

MichaelFS said:

I played around today with highest quality TIFF's: 2560 X 1920,
FINE, etc.
I didn't realize that they would be 'recorded' at 72 ppi. So I open
this picture up in PS, and it's 36" X 27"!! LOL! I hadn't given
this issue much thought, I guess. For some reason, I was thinking
that highest quality images were always recorded at a resolution
higher than 72!

I'm going to be printing at 13" X 19" on an Epson 2200 at somewhere
between 240 and 360 dpi.

Am I going to have to downsize this TIFF file in PS (going down to
13X19 & 300dpi)? That's throwing away pixels and adding them. This
doesn't sound very choice in terms of maintaining image quality for
prints. Is there something I'm missing here? Is there a setting
that I'm missing that can have the 717 record a TIFF file at say,
300ppi?

Sorry if this post is a duplicate, but I don't think the last one I
sent got through.

Click to expand...

Yeah, you're missing some basics in terms of pixel knowledge. If
you open any of the pictures from your 717 in photoshop, ps will
tell you it is so many pixels by so many pixels. That is the actual
dimension in pixels. Below that (in the Image Size dialog box) you
will see that image will print so many inches X so many inches (if
you have inches selected for the document size) at 72 dpi. In your
case you have 2560 pixels along one side, which at 72 pixels per
inch, would equate to 36". I'm assuming your numbers are right so
72X36 should be 2560. If you wanted that printed at 144dpi you
would get half the length, 18". If you want to print it as a
19"xwhatever then you will have to allow Photoshop to interpolate
the image because you simply do not have 19" at 300dpi...it would
require 5700pixels along that axis. Photoshop could just as easily
default to describing your photograph with 300dpi resolution, it
would just describe it as printing a smaller picture. either way, a
picture with 2560x1920 pixels has just that many pixels and from
there you can divide the inches you are going to use into each side
to see how many "native" pixels you really have available.
Photoshop can interpolate pretty well and a good, sharp photo can
indeed print out to 13x19 with that many original pixels and still
end up with a good print ( I also have a 2200); I've even sent off
and done nice prints at 20x30 but I wouldn't call them crystal
clear at that resolution. Always use bicubic interpolation in
Photoshop. It's the better algorithm.

Click to expand...

MichaelFS said:

I played around today with highest quality TIFF's: 2560 X 1920,
FINE, etc.
I didn't realize that they would be 'recorded' at 72 ppi. So I open
this picture up in PS, and it's 36" X 27"!! LOL! I hadn't given
this issue much thought, I guess. For some reason, I was thinking
that highest quality images were always recorded at a resolution
higher than 72!

I'm going to be printing at 13" X 19" on an Epson 2200 at somewhere
between 240 and 360 dpi.

Am I going to have to downsize this TIFF file in PS (going down to
13X19 & 300dpi)? That's throwing away pixels and adding them. This
doesn't sound very choice in terms of maintaining image quality for
prints. Is there something I'm missing here? Is there a setting
that I'm missing that can have the 717 record a TIFF file at say,
300ppi?

Sorry if this post is a duplicate, but I don't think the last one I
sent got through.

Click to expand...

Bernd Taeger said:

Please disregard the 72 ppi thinghy. It is only a numerical figure
attached to the JPEG or TIFF file header. To arrive at a (for
example) 240 ppi filele header, in PS: goto Image-> Image Size and
UNCHECK "Resample Image", so the pixel count remains the same. Then
enter in the "Resolution"-box 240. Now save in " tif" (or highest
quality " jpg", if you must), to avoid further losses of the image
quality. Thats all.
A better way would be to use the Crop-tool and to enter the
destination values, such as Width, Height and Resulution (place
"in" for "inches" after the the numerical size values in PS7, I.e.
"19 in"), and to crop your picture, even to the maximum dimensions
if you like the full frame uncropped. Note that if not the same
aspect ratio as your original, some loss at the height or the
lenght will occur. Also note that you may be "ressing up" to
acquire the desired sizes.
Also keep in mind that while the screen resolution will show OK at
72 ppi, the printer output will need a lot more, such as 200...300
ppi in certain cases, which will reduce the print size compared to
the 72ppi sizes. That is the reason of the possible "upressing" of
the original pixel matrix. Again, save as .tif", .psd" or
(highest quality " jpg", if you must, with minimal losses)
--
Bernd Taeger

Click to expand...

MichaelFS said:

Bernd Taeger said:

Please disregard the 72 ppi thinghy. It is only a numerical figure
attached to the JPEG or TIFF file header. To arrive at a (for
example) 240 ppi filele header, in PS: goto Image-> Image Size and
UNCHECK "Resample Image", so the pixel count remains the same. Then
enter in the "Resolution"-box 240. Now save in " tif" (or highest
quality " jpg", if you must), to avoid further losses of the image
quality. Thats all.
A better way would be to use the Crop-tool and to enter the
destination values, such as Width, Height and Resulution (place
"in" for "inches" after the the numerical size values in PS7, I.e.
"19 in"), and to crop your picture, even to the maximum dimensions
if you like the full frame uncropped. Note that if not the same
aspect ratio as your original, some loss at the height or the
lenght will occur. Also note that you may be "ressing up" to
acquire the desired sizes.
Also keep in mind that while the screen resolution will show OK at
72 ppi, the printer output will need a lot more, such as 200...300
ppi in certain cases, which will reduce the print size compared to
the 72ppi sizes. That is the reason of the possible "upressing" of
the original pixel matrix. Again, save as .tif", .psd" or
(highest quality " jpg", if you must, with minimal losses)
--
Bernd Taeger

Click to expand...

Yes! That's what I was looking for: A way to get to to the maximum
image I can get out of 2560X1920 @ 300ppi (8.5 X 6.4) w/o degrading
the image quality. From 8.5 X 6.4, I can use PS's interpolation
engine to incrementally 'bump' it up to what size I need. I don't
know why I figured the camera did the 'downsizing' for me when in
its highest quality file setting. One of those days, I guess!

Click to expand...

MichaelFS said:

MichaelFS said:

Bernd Taeger

Click to expand...

Yes! That's what I was looking for: A way to get to to the maximum
image I can get out of 2560X1920 @ 300ppi (8.5 X 6.4) w/o degrading
the image quality. From 8.5 X 6.4, I can use PS's interpolation
engine to incrementally 'bump' it up to what size I need. I don't
know why I figured the camera did the 'downsizing' for me when in
its highest quality file setting. One of those days, I guess!

Click to expand...