Resolution of 350D vs D70


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filofari

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#1
Hi all,

yesterday I tried out both cams and realised that the resolution of 350D is 72dpi and 300dpi for D70. Does that mean the printing quality of D70 would be better?

newbie here :sweat:
 

Zplus

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Mar 16, 2002
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#3
filofari said:
Hi all,

yesterday I tried out both cams and realised that the resolution of 350D is 72dpi and 300dpi for D70. Does that mean the printing quality of D70 would be better?

newbie here :sweat:
Nope, thats not wat it would imply....

D70 largest image is 3008 x 2000 pixels = 6016000 pixels
350D largest image is 3456 x 2304 pixels = 7962624 pixels

At 72dpi (dots per inch):
D70 will generate an image of 3008/72 x 2000/72 = 41.8 x 27.8 inches
350D will generate an image of 3456/72 x 2304/72 = 48.0 x 32.0 inches

At 300dpi:
D70 will generate an image of 3008/300 x 2000/300 = 10.0 x 6.7 inches
350D will generate an image of 3456/300 x 2304/300 = 11.5 x 7.7 inches

For reasonable print, 250dpi is enough:
D70 will generate an image of 3008/250 x 2000/250 = 12.0 x 8.0 inches
350D will generate an image of 3456/250x 2304/250 = 13.82 x 9.2 inches


Just have to take note that you set the dpi to get a desired print size. The image resolution is always the same, either the 6 megapixels or 8 megapixels.

Looking from the point of view of the printed images....

4R prints (4x6 inches):
D70 will yield a 3008/6 x 2000/4 = approx 500 dpi image
350D will yield a 3456/6 x 2304/4 = 576 dpi image

S8R (8x12 inches):
D70 will yield a 3008/12 x 2000/8 = approx 250 dpi image
350D will yield a 3456/12 x 2304/8 = 288 dpi image

Hence, if you don't crop and use full image to print, you get slightly better resolution with the 350D. Expected, since its a 8 megapixel versus a 6 megapixel camera. Also, if you shoot at ISO1600 on the 350D, and downsize it to 6 megapixels, you would have reduced some noise too.

Of course, your choice of which system should not be based on image size alone.... other factors like lens, accessories and features come in. The sensor resolution will always increase as time goes by... ;p
 

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