Question about Canon EOS 400D / Rebel XTi Digital Camera

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I am taking pictures at 6 megapixels as they need to be printed big. I need them at 300dpi and the camera takes them at 72 dpi - how do i change this setting? dpi is 72 Iwant to go to a larger dpi (300)

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  • adrian5beech May 11, 2010

    How and why are you taking them at 6 megapix, as the 400D camera is capable of taking at 10megapixels - taking at less is wasting part of the point of having a 10 mega camera, and will give you a smaller picture too - only 60% of your potential picture size is being captured - set your camera to the biggest and finest jpeg setting, or if you want, the RAW setting, and take the photos - you will have the best pictures you can get with the camera - if you choose raw, you will need to edit the photo in the Canon software which comes with the camera - the DPP program, which will then save them as a jpeg fot editing in Photoshop or other package, which is where you can change the size.

    Anyway, you need to understand that the camera just takes so many pixels - it doesn't actually take at so many dpi. Your computer SHOWS them at about 72dpi on the screen. If you use photoshop or some other image processing package, you can change the size of the image. If you look at the size of the image, you will find that at 72dpi, the picture is 54 inches wide - which sounds big, but at the 300dpi, which is the quality for a good print, the photos from this camera will normally be about A4 size. If you want bigger, it needs to be done in Photoshop or your editing package on computer. You can do this in Photoshop by opening the picture, clicking on 'image' then drop down to 'resize', and then enter the picture size you want - you can choose the width or height you want, and then put the number of pixels at 300, instead of the 72. You will then have the picture at the size you want, and the definition you need for printing - you don't say how you will be printing, so I don't know how bigh you want - if any of this is not clear, please let me know, and I will try and help some more





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It'se easy to do :) just shoot them in RAW mode ... they will be 10 MPIX and with 300 DPI :D

Posted on Dec 01, 2008


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Dots per inch (DPI) is an output specification and is completely irrelevant as far as the camera is concerned. It's determined when you print the picture, not when you take it.

As an example, let's say you took a picture that's 2000 by 3000 pixels (6 megapixels). If you make a 4x6 print of it, you're printing at 500 dpi. If you make a 8x12 print of it, you're printing at 250 dpi, but it's still exactly the same file from the camera.

The program you use to print your pictures will let you set the DPI. Your camera has to put some number in there, and so it probably uses 72.

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