Question about Canon Rebel XT / EOS 350D Digital Camera

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Creating a 300 dpi x 300 dpi file

I need a 300dpi image for a magazine. I sent them a photo using my Canon 350 digital camera but it was 96dpi. They wrote: 300 dpi at a size of 5cm x 5cm is what we need.

How can I produce a 300 dpi image using my Canon 350 ?

Thank you!

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  • cnu77 Dec 29, 2008

    Even i face the same problem.

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You need to be able to change the DPI setting in the image file. This can be done in most complete photo editors, though they tend to name the procedure in different ways. In Corel Photo-Paint, you would look for "Resample Image". In the open source photo editor Gimp, look for "Scale" under "Image".

In all such procedures, what you want is to set both the vertical and horizontal DPI values to 300, apply them, then save the image. Please do save it to a different filename, since you lose some quality of JPEG images every time they are saved.

Posted on Sep 25, 2008

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I have used last 4 year canon 2900B printer. How to set 300 dpi printing resoluation


Canon PIXMA Manuals MG2900 series Resolution
Resolution The data in the image you have scanned is a collection of dots carrying information about brightness and color. The density of these dots is called "resolution", and resolution will determine the amount of detail your image contains. The unit of resolution is dots per inch (dpi). Dpi is the number of dots per inch (2.5 cm). The higher the resolution (value), the more detail in your image; the lower the resolution (value), the less detail.

How to Set the Resolution You can set the resolution in Resolution on the (Scanning from a Computer) tab of the Settings dialog.
Appropriate Resolution Settings Set the resolution according to the use of the scanned image.
Item Type Use Color Mode Appropriate Resolution Color photo Copying
(Printing) Color 300 dpi Creating a postcard Color 300 dpi Saving to a computer Color 300 dpi Using on a website or attaching to e-mail Color 150 dpi Black and white photo Saving to a computer Grayscale 300 dpi Using on a website or attaching to e-mail Grayscale 150 dpi Text document (document or magazine) Copying Color, Grayscale, or Black and White 300 dpi Attaching to e-mail Color, Grayscale, or Black and White 150 dpi Scanning text using OCR Color or Grayscale 300 dpi Important
  • If you double the resolution, the data size of the scanned image quadruples. If the file is too large, the processing speed will slow down significantly, and you will experience inconvenience such as lack of memory. Set the minimum required resolution according to the use of the image.
Note
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If you didn't shoot them at 300 dpi you cannot convert them to such in your camera. You can upscale them in a software program like Photoshop or the free GIMP program but the quality will suffer. My suggestion would be if possible, to re-shoot the images after changing your camera settings to 300dpi or better.

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It's not a camera setting.
DPI is "dots per inch". This only has meaning when the picture is output (usually printed, but also displayed on a screen). You can make two different-sized prints from the same photo file, and they will have different DPI settings even though they come from the same file.
A photo editing/printing program will let you control the DPI when you print a photo (and some will let you change the value when you save the file).

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1 Answer

Canon SD1300 setting for 300dpi size 2.75 x 2.975 how to set camera


It's not a camera setting.
DPI is "dots per inch". This only has meaning when the picture is output (usually printed, but also displayed on a screen). You can make two different-sized prints from the same photo file, and they will have different DPI settings even though they come from the same file.
A photo editing/printing program will let you control the DPI when you print a photo (and some will let you change the value when you save the file).

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1 Answer

Canon SD1300 setting for 300dpi size 2.75 x 2.975 how to set camera


It's not a camera setting.
DPI is "dots per inch". This only has meaning when the picture is output (usually printed, but also displayed on a screen). You can make two different-sized prints from the same photo file, and they will have different DPI settings even though they come from the same file.
A photo editing/printing program will let you control the DPI when you print a photo (and some will let you change the value when you save the file).

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The DPI (dots per inch) number only has meaning when printing the picture. It's meaningless to a camera.
The M1093IS takes photos that are 3672 x 2748 pixels at its best resolution. If you make a 4x6 print of one, you'll be getting more than 600dpi. If you make a 8x10 print of the same picture, you'll only be getting about 300dpi. Yet they're made from the same image file.
If you must change the image file itself, open it in just about any photo editor, change the DPI field, then save the file. Make sure you do this to a copy, not the original.

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Not really, since "300 dpi" is a print resolution specification. The camera takes pictures at whatever resolution you have set (0.3MP to 7.1MP on the A570).

If you print a 0.3MP photo at 300dpi, you'll get a picture 1.6 inches by 2.1 inches (smaller than a business card). If you print a 7.1MP photo at 300dpi, you'll get a picture about 8 inches by 10 inches. You can also get an 8x10 from the 0.3MP if you print at 60dpi, but the result will be rather grainy.

Again, "300 dpi" has no meaning to the camera.

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1 Answer

How do I take a picture at 300dpi


The DPI are not a user allowed settings. Normally DPIs are factory defined.
You can change the DPI using software. Normally the image administration software and advanced softwares can allow you to change it.

Remember an important issue: DPIs are a printing matter not an image quality matter. Yo can set an image to 300 DPI and the same to 72 DPI and you will see no difference between both images.

A good camera and your skills will allow you to take high quality images.

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Sony H1 takes photos at 72 dpi by default. But the picture quality will be good. if you want to convert it to 300dpi open the picture in adobe Photoshop and select image size and change resolution to 300 dpi. but the file size will be very high to up load. if you want to reduce the file size select the image size in adobe photoshop and reduce it according to your requirement. if my solution proves good please rate it. Regards.

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You can download manuals here.

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