Go Back   Steve's Digicams Forums > Digicam Help > General Discussion

Thread Tools Search this Thread
Old Mar 8, 2006, 7:35 AM   #1
Junior Member
Join Date: Sep 2005
Posts: 17

My friend's Sony DSC-H1 uses 72 Pixels per inch for its images. My Nikon Coolpix 5400 uses 300 pixels per inch. Why this apparent discrepancy? This is why a 5 MegPixel image shot using the DSC-H1 shows a print size of 36x27 inches in Adobe Photoshop, and a same 5 MP image from Coolpix 5400 shows a print size of 8.5x6.5 inches. Am i missing out?
aninda_d is offline   Reply With Quote
Sponsored Links
Old Mar 8, 2006, 7:51 AM   #2
Senior Member
Join Date: Oct 2003
Location: Indian Rocks Beach, FL
Posts: 4,036

There is a document size embedded in most image file types. With images from a digital camera that document size and the resultant PPI are totally meaningless. They had to put something because there is a requirement in the file. Most go with the old Mac screen resolution of 72 PPI, my old Olympus used 150 PPI and evidently that particular Nikon uses 300.

If you had a giant printer and pushed "Print" with no initial requirement for size or ratio, the prints would come out the sizes listed. Most people don't do that of course. PPI is only significant once you have chosen a document size. Before that the image is simply 2560 X 1920 pixels or whatever.

slipe is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 10:52 AM.