D80's 300dpi vs. Canon 20D's 72dpi

[hemohemo]

Hi all,

Puzzled by the differences in vertical and horizontal resolution of the two cameras.

Does anyone know why 20D's dpi can be so low? Is that an indication of the Canon camera's image quality? Or is Nikon too conservative?

Anyone has dpi for other Nikon?

Thanks.
cs

[theRBK]

dpi in an image in a computer isn't a factor in image quality... you can easily change it around from 300 to 72 to 150, as long as the absolute number of pixels is the same, the image quality is the same... dpi comes into play only in print, where a higher dpi print tends to be sharper than a lower dpi one... just for the case of the 20D with 72 dpi images, just remember to change it to 300 when printing and should have no prob

[giantcanopy]

Originally Posted by theRBK dpi in an image in a computer isn't a factor in image quality... you can easily change it around from 300 to 72 to 150, as long as the absolute number of pixels is the same, the image quality is the same... dpi comes into play only in print, where a higher dpi print tends to be sharper than a lower dpi one... just for the case of the 20D with 72 dpi images, just remember to change it to 300 when printing and should have no prob

yups.
this is wat i understand, correct me if i am wrong.
say the camera is capable of shooting 3600x2880 dpi of information stat. thats the total amt of pixel info it can possibily capture

then at an output of say 72dpi, u get a picture of 3600/72 by 2880/72 = 50 inches by 40 inches. but at 72dpi photo printing wouldn't look too good, and say we now change to 300dpi and this will now give us 3600/300 by 2880/300 = 12 by 9.6 inches

DPI is only relevant to how u wanna output the picture on web or in print.

hope it helps

Ryan

[hemohemo]

Maybe the question here is should have been

'what is the reason for Nikon to set D80 at 300dpi and Canon to set 20D at 72dpi?'

Technically I believe there must be some (engineering) reason/motivation behind the decision.

Or perhaps I should have accepted that as granted.

cs

[scenar]

Originally Posted by hemohemo Hi all, Puzzled by the differences in vertical and horizontal resolution of the two cameras. Does anyone know why 20D's dpi can be so low? Is that an indication of the Canon camera's image quality? Or is Nikon too conservative? Anyone has dpi for other Nikon? Thanks. cs

where did u get this information from?

As already mentioned, dpi is not related to the camera's sensor output, only to the final print quality

[ST1100]

Originally Posted by hemohemo 'what is the reason for Nikon to set D80 at 300dpi and Canon to set 20D at 72dpi?' Technically I believe there must be some (engineering) reason/motivation behind the decision.

72 dpi is the most common screen resolution, as in on most screens, measuring one inch off will give you 72 pixels. 300 dpi is de-facto print resolution for most printers, and not coincidentally the maximum resolution people with normal unaided eyesight can resolve on paper, at any viewing distance.

[lightning]

the no. of dpi in both system is just a recording format. No relation to the image quality.

Try in Photoshop, create a new document @300dpi, then paste a image with 72dpi and 300dpi and see the diff. (DPI like many has mentioned, has to do with print)

May be Canon is catering more to people who will post their pics online @72dpi while Nikon caters more towards people who want to print @ 300dpi.