image resolution

[SDloCal]

I am new to the whole digital revolution and photoshop, so if someone could answer my question I would greatly appreciate it. What is an acceptable resolution for an image in photoshop. I have been saving them at 300 (image size is 5x7)? I was wondering if 300 is enough if I wanted to print clear images at 8.5x11?

[scottbergerphoto]

I use a 10D,shoot RAW, convert to 8 bit tiff, edit in PSE2, resolution 300dpi and print borderless 8.5X11 at 2880dpi. No problem. I use an Epson 2200.
Regards,
Scott

[maderito]

I am new to the whole digital revolution and photoshop, so if someone could answer my question I would greatly appreciate it. What is an acceptable resolution for an image in photoshop. I have been saving them at 300 (image size is 5x7)? I was wondering if 300 is enough if I wanted to print clear images at 8.5x11?

When saving images for later use, I think of saving pixels.

An uncropped full resolution 10D image is 3072 X 2048 pixels. I save the data for all these pixels, typically as a TIF file. A copy of this file can always be cropped and resized to any desired screen or printer resolution. A 3072 X 2048 pixel image printed at 300 PPI gives you a print of almost 10" X 8" and nearly 17"X 11" at 240 PPI. Both 300 PPI and 240 PPI yield acceptable prints under most conditions.

Note that PPI (pixels per inch) is different than DPI (dots per inch). In printing, DPI refers to the little droplets laid down by your printer. There is no one-to-one correspondence between PPI and DPI. You can print 1 pixel with many ink drops!

[CyberDyneSystems]

Yes,. ignore the print res (300 etc.. and 5"X7" etc...)

...and make ABSOLUTLEY SURE that when you are resaving an image that YOU ARE NOT CHANGING THE PIXELS.

Keep every pixel you have! :)

If when you save the image a popup asked how you want to interpolate or scale,.. then you are changing the original pixel dimensions... and thus changing the images quality (for the worse)

[BDM]

I use a 10D,shoot RAW, convert to 8 bit tiff, edit in PSE2, resolution 300dpi and print borderless 8.5X11 at 2880dpi. No problem. I use an Epson 2200.
Regards,
Scott

I'm using almost the exact same configuration except the camera is a DRebel. "No problem" is an understatement. The quality is outstanding. I've also made some 11X14 prints and I had to look more than once to be sure the prints weren't from medium format or larger originals. If I wanted to make real whoppers - - say 20X24 or 30X40 I'm sure the larger formats would come into their own. But since the 2200 is limited to 13 inches wide, the DRebel with the resolution settings you mention seem just fine to me.

Bruce

[chris.bailey]

I have produced poster sized prints (A0) from the D60 on an HP1050C on photo paper ($$$$$) at work and yes you can start to see pixelation close up, from the usual view distance of such large sheets the quality is astounding.

[scottbergerphoto]

I use a 10D,shoot RAW, convert to 8 bit tiff, edit in PSE2, resolution 300dpi and print borderless 8.5X11 at 2880dpi. No problem. I use an Epson 2200.
Regards,
Scott

I'm using almost the exact same configuration except the camera is a DRebel. "No problem" is an understatement. The quality is outstanding. I've also made some 11X14 prints and I had to look more than once to be sure the prints weren't from medium format or larger originals.
Bruce
I know. :)
Scott

[SDloCal]

Thank you all for the advice. I really appreciate all of the help that I can get.

[Jesper]

Have a look at the following page: Display, Printing, DPI and PPI (http://www.photo.net/learn/resize/)

[Digital Prophet]

Ok I am just a noob so I am kind of missing something.

I have a Digital Rebel. And I have noticed that when I open a file shot in "large JPG" that the PPI resolution is 180. I don't shoot RAW too too often (something I intend to change). But I have noticed that the resolution on my TIF (converted from the RAW in Canon's software) is something like 90 PPI.

What am I missing on this? Are you guys changing the PPI in Photoshop? Is there a setting?

As always, any help would be appreciated.

- Digital Prophet -

[dn7elson]

What am I missing on this? Are you guys changing the PPI in Photoshop? Is there a setting?

The PPI is really just an instruction to the printer as to how to print the image. The image is still just X pixels by Y pixels.

[PhotosGuy]

But I have noticed that the resolution on my TIF (converted from the RAW in Canon's software) is something like 90 PPI.

Read pg W-44 in the Software manual. It shows where to set the TIFF ppi when you convert from RAW. It can be set from 10 to 2000, which should be high enough for anyone!
:wink:

EDIT:
That's the OTHER Software manual that came in the box with your camera.
It will show you where to set the ppi before you convert from RAW. You won't have to try to do it in P$hop!
Sorry I left that out!

[Jesper]

Ok I am just a noob so I am kind of missing something.

I have a Digital Rebel. And I have noticed that when I open a file shot in "large JPG" that the PPI resolution is 180. I don't shoot RAW too too often (something I intend to change). But I have noticed that the resolution on my TIF (converted from the RAW in Canon's software) is something like 90 PPI.

What am I missing on this? Are you guys changing the PPI in Photoshop? Is there a setting?

As always, any help would be appreciated.

- Digital Prophet -
Really, have a look at the following page: Display, Printing, DPI and PPI (http://www.photo.net/learn/resize/)....

A digital image consists of a matrix of pixels. The only thing that's important is how many pixels there are in your image - for example, 3072 x 2048. Forget about the DPI and PPI numbers - those numbers, by themselves, don't tell you anything about the resolution of the image.

If you print your 3072 by 2048 pixel image at a certain size, for example 6 x 4 inches, you will get an image with a resolution of 3072 / 6 = 512 pixels per inch (PPI). If you print it at another size, you'll get a different resolution. Note that you can only talk about resolution while referring to a printed version of the image of a certain size. Resolution is not a property of the image by itself.

The page mentioned above explains it in detail and explains how to change the size and / or DPI setting in Photoshop.