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Rosie

Posts 157
Hi mcb photographers,

We have a member who shoots with a Canon EOS 400D and has noticed that sometimes the images on her camera are 300dpi and some are 72dpi (even when they are taken in succession and on the same setting).

Has anyone else had this problem or heard of this happening? Any tips or knowledge here would be much appreciated.

Cheers!
The mychillybin team.

Canon_S.I.

Posts 283
Hi Rosie and 400d user

The 400D is set at 72DPI in the factory settings and as far as i know the only way to change the dpi is by using software,like Photoshop,Aperture ect, and can't be changed in camera, on any setting.

Kiwiangel

Posts 101
I use the 400D and I can't say I've ever seen that happen.

I open my photos in Photoshop Elements 6.0 and I always have to change them from 240 to 300. I think that might be a convention of PSE rather than the camera though.

sizzlingbadger

Posts 42
Most digital camera's embed a dpi of 240. This value is completely meaningless until you print the image.

sizzlingbadger

Posts 42
Rosie wrote:

Hi mcb photographers,

We have a member who shoots with a Canon EOS 400D and has noticed that sometimes the images on her camera are 300dpi and some are 72dpi (even when they are taken in succession and on the same setting).

Has anyone else had this problem or heard of this happening? Any tips or knowledge here would be much appreciated.

Cheers!
The mychillybin team.



The dpi value recorded in the metadata of the file is most likely being updated by software and not the camera. How are the images being transferred to the computer ?

sizzlingbadger

Posts 42
It looks like Canon embed 72dpi for jpeg images. But remember this has nothing to do with the images quality coming out of the camera it is just an instruction for printers.

Rosie

Posts 157
Hi Canon_S.I, sizzlingbadger and kiwiangel,

Thanks for the feedback and info. It does seem very strange what is happening... We have also suggested they contact Canon for more info on this to hopefully help shed some light on the matter.

Thanks again!

Karendpics

Posts 69
Thanks everyone for your thoughts, I have found that most images are accepted when I edit them through Microsoft Photo Editor, No idea why, but it seems to work or now. I will contact Canon also and let you know any outcome. Cheers Karen

Karendpics

Posts 69
I would also like to thank The Mychillybin Team for their support and helpful advice. We have a great team here, much appreciated. Thank you. Karen

Rosie

Posts 157
No worries Karen! The mcb team are always happy to help

oseiler

Posts 10
Hi,

Most digital cameras set the DPI value to 72 DPI in the jpg files they produce (look at the files directly on the memory card).

The DPI (dots per inch) setting puts the resolution of an image (number of pixels=dots) in relation to a physical size (inch).
Basically, as a digital image has no physical size, there is no point in storing a specific DPI setting in the file itself - it only helps a printer if you want to tell it on which physical size you want the image printed.

Thus the DPI setting has no meaning whatsoever for image quality. You can store the same image containing the same information and amount of pixels at any random DPI setting - it won't change the image itself at all. (Consequently from my point of view MCBs limitiation on 300 DPI for uploading images makes no sense at all but that's another discussion).

Check Wikipedia for more information: http://en.wikipedia.org/wiki/Dots_per_inch#DPI_or_PPI_in_digital_image_files

Most image editing software allows you to change the DPI setting, but some programs do a lousy job and resample the image. GIMP for example works fine (http://www.gimp.org/), go to Image->Scale and change the 'resolution'.

Cheers,
Oliver

absolut_thomas

Posts 24
Well done, Olli! I couldn't have explained it that good in English :-) I really like the part with your opinion on uploading at 300 dpi, which I totally agree to (as I very often forget to change the setting, only realizing it when MCBs Homepage tells me: Ooops, wrong resolution...).

Gruss
Thomas
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