Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-23-2013, 08:39 AM   #1
Site Supporter
Ric's Avatar

Join Date: Dec 2011
Posts: 122
240 dpi

I was reviewing the properties on some of the pictures I have taken with my K-5. I usually shoot RAW then covert to JPEG using Photoshop Elements 10. I noticed that each picture is about 12-14MB in size but the horizontal and vertical dpi are both 240. The overall resolution for one example is 3264 x 4928 with a 24 bit depth. Perhaps I am over analyzing this but is the 240 dpi number normal as I would expect that to be higher and what exactly is it referring to? Thanks for clarifying my likely lack of knowledge and concern.

03-23-2013, 09:51 AM   #2
Pentaxian




Join Date: Jan 2012
Location: Slovenia
Posts: 2,141
Dots Per Inch. I'm guessing this is in the "export" window.
03-23-2013, 09:53 AM   #3
Senior Member
Professor Batty's Avatar

Join Date: Aug 2012
Posts: 118
QuoteOriginally posted by Ric Quote
I was reviewing the properties on some of the pictures I have taken with my K-5. I usually shoot RAW then covert to JPEG using Photoshop Elements 10. I noticed that each picture is about 12-14MB in size but the horizontal and vertical dpi are both 240. The overall resolution for one example is 3264 x 4928 with a 24 bit depth. Perhaps I am over analyzing this but is the 240 dpi number normal as I would expect that to be higher and what exactly is it referring to? Thanks for clarifying my likely lack of knowledge and concern.
The dpi is set by the camera and/or the software; it is an arbitrary, convenient size used in the editing program when the file is opened. At 240 dpi you will get an image sized about 25.3 by 12.7. Other cameras may default to 300 dpi = image size which will be about 16.4 x 10.3, other cameras will use 72 dpi, image size = about 44x66. It's all the same. The 12-14MB "picture size" is the size of the stored file. Your actual size in MB when you open the picture will be more than triple that, you should be able to check that inthe "Image sizing" (or what ever it is called in Elements) menu drop down.
03-23-2013, 10:37 AM - 1 Like   #4
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,288
QuoteOriginally posted by Ric Quote
Perhaps I am over analyzing this but is the 240 dpi number normal as I would expect that to be higher and what exactly is it referring to?
DPI means dots per inch and is essentially a meaningless number except when you are printing. Your image size is 3264 x 4928, that is what is important. The DPI translates that image size into a physical dimension based on the display medium. For high quality ink jet that might be 300dpi (although most articles I've read say 240 is indistinguishable) or 5dpi for a huge billboard. The camera (or jpeg engine) assigns a default dpi when the jpeg is cooked. This can be changed in the printing or editing software.

A digitally stored image has no physical dimensions until those are assigned and that is determined by the output or display method.

03-24-2013, 06:37 AM   #5
Ric
Site Supporter
Ric's Avatar

Join Date: Dec 2011
Posts: 122
Original Poster
Thanks for the knowledgeable answers. You have cleared this up for me.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dpi, dslr, k-5, k-5 ii, k-5 iis, k5, pentax k-5
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
85mm F1.4 $240 Adam Pentax Price Watch 5 11-19-2012 07:22 AM
For Sale - Sold: Pentax k10d w/ DA 18-55, holster case, sd card and option for grip - $240 vagrant10 Sold Items 2 10-12-2012 06:45 AM
Image Resolution and DPI Deiberson Pentax K-5 20 05-05-2012 06:08 AM
Novatron 240? Clinton Pentax Camera and Field Accessories 7 02-08-2011 10:06 PM
Dpi for A4 timk Digital Processing, Software, and Printing 10 08-30-2008 09:35 PM



All times are GMT -7. The time now is 04:59 PM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top